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(5096 results)
1 letter:
.
3 letters:
fly,
hop,
iva,
lei,
may,
nip,
nod,
pea,
soy,
tea,
yet
4 letters:
akee,
aloe,
arum,
atar,
bine,
cyme,
dahl,
dhal,
disa,
dita,
flag,
head,
hemp,
hops,
hoya,
ilex,
inga,
iris,
lens,
lily,
lime,
mean,
mint,
pink,
pixy,
poke,
posy,
puka,
ramp,
soja,
soya,
spur,
tipu,
titi,
vase,
whin,
wilt
5 letters:
adorn,
agave,
alcea,
arere,
aroid,
aster,
athar,
attar,
avens,
bhang,
blaze,
bloom,
briar,
brier,
broom,
canna,
catha,
ceiba,
ceibo,
cheer,
cirio,
crowd,
cypre,
daisy,
draba,
elder,
frost,
funka,
furze,
galax,
gerea,
gorse,
grave,
guama,
hakea,
heath,
hosta,
hovea,
islay,
kiaat,
knawe,
kudzu,
layia,
lilac,
loasa,
lotus,
luffa,
lupin,
madia,
mahoe,
marum,
medic,
mesua,
molle,
msasa,
naiad,
nopal,
order,
orpin,
orris,
ottar,
oxeye,
oxlip,
peony,
phlox,
pichi,
pixie,
plant,
pluck,
poppy,
press,
pusly,
pyxie,
retem,
roble,
runch,
saman,
samba,
scoke,
sedge,
senna,
siris,
spike,
spray,
sprig,
stock,
sulla,
tacca,
torch,
toyon,
umbel,
vanda,
vetch,
vigna,
vitis,
xyris,
yucca,
zaman
6 letters:
abelia,
albuca,
alpine,
althea,
ananas,
aralia,
avaram,
axseed,
azalea,
bennet,
bletia,
blolly,
bonduc,
briony,
bryony,
bulbil,
calaba,
carpet,
cassia,
cassie,
catgut,
catnip,
cereus,
chanal,
chanar,
chaste,
cheese,
chicot,
cleome,
clocks,
clusia,
coleus,
coptis,
cornel,
corymb,
cosmea,
cosmos,
cowage,
crocus,
cymbid,
cymule,
daphne,
disbud,
double,
drypis,
floral,
flower,
galaxy,
garden,
garget,
genipa,
henbit,
hyssop,
idesia,
indigo,
kentan,
knawel,
konini,
kowhai,
kurrat,
laelia,
linden,
lupine,
madder,
madnep,
maikoa,
malope,
mayaca,
mayeng,
medick,
mimosa,
myrtle,
obeche,
obechi,
ononis,
orchid,
orchis,
orpine,
paeony,
paigle,
peanut,
phaius,
poplar,
privet,
quince,
raceme,
raetam,
redbud,
rosita,
savory,
scilla,
senega,
shawny,
single,
spirea,
squill,
stelis,
stevia,
styrax,
thrift,
tisane,
tollon,
tutsan,
wampee,
wickup,
wicopy,
wreath,
zamang
7 letters:
abronia,
abscise,
aconite,
alecost,
alehoof,
alfalfa,
alkanet,
althaea,
alyssum,
amorpha,
amsonia,
anchusa,
anemone,
astilbe,
awlwort,
banksia,
beebalm,
begonia,
benweed,
blossom,
bogbean,
bomarea,
boneset,
bouquet,
brassia,
buckeye,
bugbane,
bugloss,
bulblet,
burbank,
cabbage,
caltrop,
camelia,
caraway,
cardoon,
carissa,
catalpa,
catclaw,
catechu,
catmint,
chaplet,
charity,
colutea,
corokia,
coronal,
corsage,
coville,
cowherb,
cowslip,
cudweed,
cyrilla,
daylily,
dehisce,
deutzia,
dittany,
dogbane,
dogwood,
dombeya,
dracula,
dyeweed,
elkwood,
epacris,
epergne,
episcia,
fanwort,
felicia,
felwort,
festoon,
filaree,
filaria,
floreal,
florist,
francoa,
freesia,
frogbit,
fuchsia,
fumaria,
garland,
gazania,
geebung,
ginseng,
gladdon,
guayule,
hemlock,
henbane,
hogweed,
honesty,
houhere,
hypoxis,
jonquil,
juniper,
kingcup,
lacepod,
lewisia,
linaria,
liparis,
lithops,
logania,
logwood,
lomatia,
lucerne,
madwort,
mahagua,
majagua,
malaxis,
mesquit,
mitella,
montane,
mullein,
myrrhis,
nin-sin,
nip off,
nitweed,
nopalea,
nosegay,
odorous,
olearia,
origami,
othonna,
paeonia,
panicle,
papaver,
pavonia,
pedwood,
petaled,
petunia,
phlomis,
potherb,
primula,
pussley,
quassia,
ragweed,
ragwort,
rampion,
rayless,
red fox,
red haw,
rooibos,
rosebay,
rosidae,
saffron,
saguaro,
sahuaro,
salsify,
sanfoin,
sanicle,
scapose,
scented,
sea ash,
sea pea,
sessile,
shittim,
shortia,
sophora,
soybean,
spiraea,
statice,
stemmer,
syringa,
tellima,
trample,
trefoil,
tritoma,
turreae,
ursinia,
vanilla,
verbena,
vervain,
waratah,
wayside,
weigela,
xylosma
8 letters:
acanthus,
achillea,
addition,
agalinis,
ageratum,
agrimony,
agueweed,
alliaria,
all over,
alstonia,
amaranth,
amberboa,
ammobium,
andryala,
angelica,
angrecum,
apiaceae,
apocynum,
aquilege,
arethusa,
argemone,
asphodel,
assorted,
baptisia,
barberry,
bartonia,
basswood,
beefwood,
bee balm,
bellwort,
bilberry,
blooming,
blowball,
bluebell,
blueweed,
blue fig,
blue pea,
bocconia,
bog star,
boltonia,
bonavist,
boxthorn,
boykinia,
buckbean,
buckleya,
buddleia,
bull bay,
bush pea,
calabura,
calanthe,
calisaya,
camellia,
camomile,
cannabis,
caragana,
cassiope,
catbrier,
clematis,
clitoria,
columnea,
complete,
costmary,
cow lily,
creashak,
cyclamen,
cynancum,
daffodil,
danewort,
daviesia,
day lily,
decumary,
dicentra,
dillenia,
dog rose,
drooping,
elk-wood,
erigeron,
erysimum,
esparcet,
fanciful,
fireweed,
flat pea,
fleabane,
flowered,
fumeroot,
fumewort,
fumitory,
galangal,
gardenia,
garishly,
gaywings,
gladiola,
gloriosa,
gloxinia,
goat rue,
goa bean,
goodyera,
harebell,
harrisia,
hawkmoth,
hawkweed,
hazardia,
heal all,
helenium,
hepatica,
hesperis,
heuchera,
honeypot,
huisache,
hydrilla,
incienso,
ironweed,
ironwood,
japonica,
kennedia,
kennedya,
keurboom,
knapweed,
kohleria,
labiatae,
laburnum,
lacebark,
lambkill,
lavatera,
lavender,
leadwort,
leaf bud,
leonurus,
licorice,
lilyturf,
livelong,
mandrake,
marigold,
mariposa,
markweed,
martagon,
martynia,
may blob,
may lily,
mesquite,
mezereon,
moorwort,
mus rose,
ocotillo,
oil palm,
old maid,
oleander,
oleaster,
oncidium,
oxtongue,
panamica,
panamiga,
pea tree,
pereskia,
petalled,
petalous,
phalaris,
photinia,
pilewort,
pineweed,
pipewort,
piqueria,
plantain,
planting,
plumeria,
plumiera,
poroporo,
primrose,
prunella,
psoralea,
quandong,
racemose,
redberry,
redbrush,
redmaids,
red gram,
remember,
richweed,
rockrose,
ropebark,
rosaceae,
rose bay,
rose bug,
rutaceae,
sabbatia,
sainfoin,
salmwood,
salsilla,
saltwort,
samphire,
sandwort,
satinpod,
scammony,
sea cole,
sea kale,
sesbania,
shadblow,
shadbush,
shamrock,
shinleaf,
shoo fly,
sidalcea,
silkwood,
snowball,
snowdrop,
soapwort,
sobralia,
sourwood,
sowbread,
sphingid,
stapelia,
starwort,
swanneck,
sweetpea,
tamarind,
tamarisk,
teaberry,
tea rose,
thevetia,
tiarella,
tickseed,
tickweed,
toadflax,
trampled,
tuberose,
turmeric,
valerian,
vernonia,
virgilia,
wartweed,
wartwort,
waxberry,
whitecup,
wig tree,
wild hop,
wingstem,
wolfbane,
woodbine,
woodruff,
xanthium,
zigadene
9 letters:
achimenes,
acropetal,
aglaonema,
agrimonia,
ague root,
ague weed,
akee tree,
alfilaria,
alfileria,
allamanda,
amaryllis,
amberbell,
andromeda,
angelique,
angraecum,
anthurium,
apetalous,
aquilegia,
attractor,
baby rose,
baccharis,
basipetal,
beach pea,
bead tree,
birthroot,
birthwort,
blaeberry,
blue flag,
blue sage,
blue star,
brooklime,
broomweed,
browallia,
bryanthus,
buckwheat,
bugleweed,
bullbrier,
burmannia,
butterbur,
cajan pea,
calendula,
callirhoe,
camachile,
campanula,
campeachy,
candytuft,
candyweed,
capitulum,
carnation,
cat's-ear,
catasetum,
cat thyme,
celandine,
chafeweed,
chamomile,
cineraria,
claytonia,
clianthus,
clintonia,
cloveroot,
coachwhip,
cockscomb,
coelogyne,
coltsfoot,
colubrina,
columbine,
combretum,
composite,
consolida,
coralwood,
coral gem,
coral pea,
corchorus,
coreopsis,
corn lily,
coronilla,
corydalis,
courbaril,
crampbark,
creamcups,
crowberry,
cupflower,
cymbidium,
daisybush,
dalbergia,
dandelion,
devilwood,
dichondra,
diclinous,
dita bark,
dryadella,
eglantine,
epipactis,
eriogonum,
erythrina,
fairy cup,
false rue,
fawn lily,
fenugreek,
feverroot,
fire-bush,
firethorn,
fire bush,
fire pink,
fire tree,
five-spot,
flame pea,
flowerbed,
forsythia,
fresh-cut,
frijolito,
fringepod,
frostweed,
frostwort,
galingale,
gas plant,
gipsywort,
gladiolus,
glasswort,
glory pea,
gnetaceae,
goatsfoot,
gomphrena,
goosefoot,
greenhood,
greenweed,
groundsel,
gypsyweed,
gypsywort,
hackberry,
hardheads,
hawk moth,
heliopsis,
heracleum,
hermannia,
hoary pea,
hollyhock,
horsebean,
horsemint,
horseweed,
huamachil,
hybanthus,
hydrastis,
hypericum,
ice plant,
innocense,
iowa crab,
jade vine,
jessamine,
jewelweed,
juneberry,
kniphofia,
kudu lily,
lamiaceae,
leadplant,
lead tree,
lent lily,
leucothoe,
lily turf,
lime tree,
liquorice,
liverleaf,
love tree,
love vine,
maleberry,
manna ash,
maravilla,
marsh pea,
mayflower,
mealberry,
medinilla,
melastoma,
mertensia,
mixed bud,
monkeypod,
monkshood,
montezuma,
moosewood,
moss pink,
moth bean,
mouse ear,
musk rose,
myristica,
myroxylon,
narcissus,
naturally,
oenothera,
onopordon,
onopordum,
oxytropis,
paloverde,
pearlweed,
pearlwort,
pea plant,
peireskia,
pellitory,
penstemon,
petalless,
pimpernel,
pine-weed,
pine lily,
pin grass,
pipe vine,
plantsman,
poinciana,
polanisia,
pond lily,
portulaca,
pussy-paw,
pussytoes,
puttyroot,
pyracanth,
pyrethrum,
rag gourd,
rain tree,
rauvolfia,
rauwolfia,
red-berry,
red maids,
red osier,
rewa-rewa,
rhipsalis,
rockcress,
rock rose,
rootbound,
rose-root,
rose moss,
rosinweed,
sandberry,
sea holly,
sea onion,
sego lily,
sicklepod,
silky oak,
silk tree,
silk vine,
silk wood,
silverrod,
smothered,
snakeroot,
snowberry,
snow lily,
soja bean,
soya bean,
spearmint,
spicebush,
stanhopea,
stonecrop,
stoneface,
stoneroot,
sturt pea,
sun plant,
swamp bay,
swamp oak,
swan-neck,
sweetleaf,
sweet bay,
sweet pea,
tamarindo,
tara vine,
tick-weed,
tipu tree,
toadshade,
toad lily,
top onion,
trompillo,
tuba root,
twayblade,
twinberry,
vase-fine,
vase vine,
water mat,
waxflower,
waxmallow,
wax plant,
whinberry,
whitlavia,
wild leek,
wild oats,
wild pink,
wild rape,
wild sage,
wineberry,
woadwaxen,
wolfsbane,
woodwaxen,
wood lily,
wood mint,
wood sage,
xylomelum,
yardgrass
10 letters:
abscission,
adobe lily,
agapanthus,
ague grass,
amber lily,
antennaria,
artificial,
asphodelus,
aureolaria,
balsamroot,
basil balm,
basil mint,
bean caper,
bear grass,
beef plant,
beetleweed,
bee orchid,
belladonna,
bellflower,
bendy tree,
bible leaf,
bird's eye,
bird vetch,
bitterroot,
bitterweed,
bitterwood,
bitter pea,
black bead,
bladderpod,
blood-twig,
bloodberry,
bluebonnet,
bluebottle,
blue bugle,
blue curls,
blue daisy,
blue devil,
blue elder,
blue mahoe,
blue poppy,
blue tulip,
bog kalmia,
bog laurel,
bog myrtle,
broom-weed,
brunfelsia,
bush poppy,
butterweed,
butterwort,
calliandra,
calliopsis,
cankerweed,
canna lily,
cape tulip,
caracolito,
carib wood,
carpetweed,
cat's-claw,
cat's feet,
cat's foot,
catananche,
centaurium,
centrosema,
chaenactis,
china jute,
china pink,
china rose,
cinquefoil,
clary sage,
clove pink,
common hop,
coneflower,
coral-wood,
coralbells,
coral bean,
coral bush,
coral tree,
coral vine,
cornflower,
cottonweed,
cow cockle,
cruciferae,
cuban bast,
daisy-bush,
daisy bush,
deer grass,
delphinium,
dendrobium,
desert pea,
desmanthus,
devil lily,
devil tree,
dipladenia,
dog fennel,
dog hobble,
dog laurel,
dragonhead,
dutch iris,
dwarf iris,
elecampane,
eleocharis,
elsholtzia,
embothrium,
epiphyllum,
eupatorium,
fairy bell,
fen orchid,
fen orchis,
fetterbush,
fiddleneck,
field balm,
fingerroot,
fire thorn,
flamboyant,
flame bush,
flame tree,
flower bed,
flower bud,
fly orchid,
foeniculum,
frangipani,
fraxinella,
frijolillo,
fritillary,
froelichia,
frog's-bit,
frost-weed,
gaillardia,
genus ilex,
genus lens,
german ivy,
gliricidia,
globe lily,
glory lily,
goat's rue,
goatsbeard,
golden cup,
golden pea,
goldthread,
gooseberry,
gopherwood,
grass pink,
grass poly,
grass tree,
gravelweed,
greenbrier,
ground ivy,
gypsophila,
heartsease,
hedge pink,
heliophila,
herb paris,
hog peanut,
hollygrape,
honeybells,
honey bell,
hop clover,
horse balm,
hylocereus,
immortelle,
indigofera,
iris verna,
jimsonweed,
judas tree,
jumby bean,
jumby tree,
kudzu vine,
lady tulip,
lead plant,
lemon balm,
lemon lily,
lennoaceae,
leper lily,
levisticum,
lion's-ear,
lyreflower,
lysimachia,
lythraceae,
male berry,
malvastrum,
mandevilla,
marguerite,
maxillaria,
meadow pea,
meadow rue,
mealy sage,
mignonette,
mistflower,
moehringia,
monkey pod,
moonflower,
moon daisy,
moose-wood,
moss phlox,
motherwort,
moxie plum,
multiflora,
naiadaceae,
najadaceae,
naked lady,
nasturtium,
needlebush,
needlewood,
neroli oil,
nitta tree,
onobrychis,
orchidales,
oswego tea,
palo verde,
parthenium,
peace lily,
peach bell,
pearl-weed,
pennyroyal,
peppermint,
pepperwood,
periwinkle,
pigeon pea,
pig laurel,
pin clover,
piperaceae,
poinsettia,
poison ash,
poison ivy,
poison oak,
poison pea,
polianthes,
precocious,
prenanthes,
princewood,
proteaceae,
purple pea,
pussy-paws,
pyracantha,
rabbitwood,
ram's horn,
red bryony,
red clover,
restharrow,
rhus ovata,
ribbonwood,
rougeberry,
rue family,
sagittaria,
sand berry,
sea-rocket,
sea dahlia,
sea spurry,
sea squill,
sedum acre,
senga root,
shadflower,
shoe black,
silverbush,
silverweed,
silver oak,
siris tree,
smoke bush,
smoke tree,
snail bean,
snakeberry,
snapdragon,
sneezewort,
specialize,
spice bush,
spice tree,
star-glory,
starflower,
star anise,
star grass,
star tulip,
sticktight,
still life,
stink bell,
stitchwort,
stone-face,
stone-root,
stone root,
strawberry,
sugar-bush,
suksdorfia,
sun spurge,
swamp lily,
swanflower,
sweetbriar,
sweetbrier,
sweet balm,
sweet fern,
switch-ivy,
sword lily,
tailflower,
tanglebush,
texas star,
thoughtful,
throatwort,
tiger lily,
tree heath,
tree onion,
tree poppy,
trifoliata,
trout lily,
true senna,
tuber root,
tulip tree,
tumbleweed,
turk's-cap,
twinflower,
umbellales,
velvetleaf,
velvetweed,
verdolagas,
wallflower,
wandflower,
water arum,
wax mallow,
wheel tree,
whitethorn,
white lily,
white titi,
whorlywort,
wild basil,
wild calla,
wild clary,
willowherb,
windflower,
wind poppy,
winged pea,
wire grass,
wolffiella,
wood avens,
wood poppy,
yard grass,
yellow pea,
zygocactus
11 letters:
aaron's rod,
abelmoschus,
alcea rosea,
antheridium,
antirrhinum,
apocynaceae,
arabidopsis,
art nouveau,
asphodeline,
ball nettle,
balsam herb,
basil thyme,
beauty bush,
begonia rex,
bengal bean,
bittercress,
bittersweet,
black sumac,
blood berry,
blue orchid,
bog candles,
bog rhubarb,
boojum tree,
brittlebush,
brown bells,
buffalo bur,
buffalo nut,
bull nettle,
bush violet,
bush willow,
button pink,
calandrinia,
calceolaria,
calico bush,
calnada pea,
campanulate,
canada lily,
canafistola,
canafistula,
carpenteria,
carum carvi,
cassia tora,
catjang pea,
cauliflower,
cheiranthus,
china aster,
chittamwood,
cleistogamy,
clover-root,
cock's eggs,
coffee rose,
coloradillo,
common hops,
conospermum,
coral drops,
corn cockle,
corn spurry,
cotoneaster,
cotton rose,
cow parsnip,
crab cactus,
crown daisy,
crown vetch,
cruel plant,
crystal tea,
dangleberry,
dead nettle,
death camas,
derris root,
desert rose,
devil's fig,
dipsacaceae,
dog mercury,
draba verna,
dwarf elder,
dwarf phlox,
dwarf sumac,
dyer's weed,
easter lily,
engelmannia,
erect bugle,
everlasting,
fetter bush,
field pansy,
finger-root,
fish fuddle,
five-finger,
flameflower,
flannelbush,
flower girl,
flower head,
fothergilla,
frangipanni,
fringe bush,
fringe cups,
frog orchid,
gand flower,
garden balm,
garden pink,
gentianales,
gentianella,
genus alcea,
genus aster,
genus catha,
genus ceiba,
genus funka,
genus gerea,
genus hakea,
genus hosta,
genus layia,
genus madia,
genus mesua,
genus tacca,
genus vigna,
genus vitis,
genus xyris,
german iris,
geum rivale,
gillyflower,
globeflower,
glycine max,
goat's foot,
golden club,
golden star,
goose grass,
grass vetch,
green broom,
groundberry,
ground pine,
ground pink,
ground rose,
gymnocladus,
hamamelidae,
haplopappus,
heath aster,
hediondilla,
helichrysum,
helleborine,
hemp nettle,
herb bennet,
herb robert,
high mallow,
hippeastrum,
holy clover,
honeyflower,
honeysuckle,
horse-brier,
horse brier,
husk tomato,
ilang-ilang,
impala lily,
indian bean,
indian beet,
indian pink,
indian poke,
inga edulis,
ipomoea nil,
irish gorse,
iris kochii,
jimson weed,
joshua tree,
kaffir boom,
king protea,
lady's leek,
lagenophera,
leaf-cutter,
leatherleaf,
leatherwood,
lemon sumac,
lenten rose,
linden tree,
lion's foot,
living rock,
lonas annua,
lyre-flower,
maiden pink,
male orchis,
manila bean,
marsh elder,
masdevallia,
meadow lily,
mental note,
merry bells,
mescal bean,
mexican tea,
mimosa bush,
mint family,
mist-flower,
mock azalia,
mock orange,
mock privet,
money plant,
moon carrot,
moss locust,
mule's ears,
musk mallow,
needle-bush,
needle-wood,
needle bush,
needle wood,
nettle tree,
opium poppy,
orchidaceae,
orchid tree,
oregon lily,
oxalidaceae,
oxeye daisy,
pagoda tree,
painted cup,
pale violet,
paris daisy,
peach bells,
peanut vine,
pentamerous,
pepper bush,
pepper tree,
physostegia,
pink shower,
pitch apple,
plume poppy,
poisonberry,
poison bush,
poker plant,
poplar tree,
portia tree,
potato tree,
potato vine,
prickly ash,
purple loco,
purple sage,
pussy's-paw,
queen's cup,
quince bush,
rabbit bush,
rattle weed,
red campion,
red dogwood,
rest-harrow,
rex begonia,
rhus glabra,
rhus vernix,
rosa canina,
rose acacia,
rose beetle,
rose chafer,
rose family,
rose mallow,
rouge plant,
rue anemone,
runner bean,
saintpaulia,
sand myrtle,
sand spurry,
sarcochilus,
scarlet haw,
schizanthus,
screw augur,
sea anemone,
sea trifoly,
sedum rosea,
senega root,
senna alata,
shad-flower,
shellflower,
shittimwood,
showstopper,
silver-bush,
silver-lace,
silversword,
silver bell,
silver lace,
sleepy dick,
slipperwort,
snailflower,
snow orchid,
sorrel tree,
sow thistle,
spanish elm,
spatterdock,
sphaeralcea,
sphinx moth,
spike heath,
staggerbush,
stephanotis,
stiff aster,
stizolobium,
stone plant,
strawflower,
sugar sumac,
sun pitcher,
swallowwort,
swan-flower,
swan orchid,
sweet basil,
sweet bells,
sweet shrub,
sweet vetch,
tail-flower,
tall mallow,
tangier pea,
tetramerous,
titi family,
tree lupine,
tree mallow,
trilliaceae,
velvet-leaf,
velvet bean,
vernal iris,
vinca minor,
vinca rosea,
vine cactus,
waldmeister,
wall pepper,
water avens,
water nymph,
wax begonia,
welsh poppy,
white alder,
white avens,
white broom,
white camas,
white daisy,
whitlowwort,
wild carrot,
wild coffee,
wild crocus,
wild lupine,
wild madder,
wild orange,
wild peanut,
wild radish,
wild teasel,
willow bell,
winged bean,
wintergreen,
winter fern,
winter rose,
witch alder,
wolf's bane,
wood laurel,
wood violet,
xeranthemum,
yerba buena,
yerba mansa,
yerba santa,
ylang-ylang
12 letters:
actaea rubra,
adam's apple,
adam-and-eve,
adonis annua,
african hemp,
african lily,
alkali grass,
alstroemeria,
althea rosea,
anigozanthus,
anthophagous,
anthophilous,
aphyllanthes,
arctic poppy,
banksia rose,
bean trefoil,
bear's grape,
beggar-ticks,
bell heather,
benghal bean,
bermuda lily,
bitter cress,
black locust,
black medick,
blazing star,
blood flower,
blue jasmine,
blue succory,
blue thistle,
bog asphodel,
bog rosemary,
boraginaceae,
bouncing bet,
brassicaceae,
brittle bush,
burning bush,
bur marigold,
butter-print,
cabbage tree,
calabur tree,
callistephus,
camomile tea,
canella-alba,
cape jasmine,
cassia alata,
chalice vine,
checkerberry,
cheddar pink,
cheerfulness,
cheeseflower,
chimonanthus,
christ plant,
christ thorn,
clusia major,
clusia rosea,
come to life,
common basil,
common broom,
common camas,
common daisy,
common heath,
common lilac,
corallorhiza,
corn campion,
corn mayweed,
corn spurrey,
cottage pink,
cream violet,
crybaby tree,
cuckoo bread,
culvers root,
cupid's dart,
cypress vine,
cyrilliaceae,
dangle-berry,
darwin tulip,
desert olive,
desert plume,
devil's claw,
devil's flax,
devil's milk,
dogwood tree,
dusty miller,
dutch clover,
dyer's-broom,
english-weed,
english iris,
erica carnea,
erica vagans,
european hop,
evening-snow,
false azalea,
false indigo,
false lupine,
false mallow,
fig marigold,
fingerflower,
flame-flower,
flame flower,
flame nettle,
flannel bush,
flannel leaf,
fleur-de-lis,
florida bean,
florist shop,
flower chain,
flower store,
four o'clock,
fringed pink,
gastrolobium,
gentianaceae,
genus ananas,
genus bletia,
genus cereus,
genus coptis,
genus cosmos,
genus genipa,
genus gnetum,
genus mayaca,
genus mucuna,
genus ononis,
genus oxalis,
genus reseda,
genus silene,
genus zinnia,
geum urbanum,
glacier lily,
gladdon iris,
glade mallow,
globe flower,
globe mallow,
golden stars,
greek clover,
ground-berry,
guelder rose,
hardenbergia,
hawk's-beard,
heather bell,
helmetflower,
hemerocallis,
herbs robert,
herb roberts,
hoary alison,
honey-flower,
honey locust,
horse cassia,
horse nettle,
hoya carnosa,
icicle plant,
indian beech,
indian cress,
indian lotus,
indian paint,
indian salad,
indian senna,
indigo broom,
indigo plant,
inga laurina,
ipomoea alba,
iris pallida,
iris persica,
iris xiphium,
ivy geranium,
joe-pye weed,
juniper bush,
kangaroo paw,
kidney vetch,
king's spear,
king begonia,
kitten-tails,
labrador tea,
lamb succory,
lamium album,
leopard lily,
lepidobotrys,
leucadendron,
lion's beard,
live-forever,
living stone,
logwood tree,
lonchocarpus,
lychnis alba,
madonna lily,
marsh mallow,
meadow clary,
mesua ferrea,
milk thistle,
molucca balm,
moon trefoil,
moth mullein,
mountain box,
mountain tea,
mullein pink,
mustang mint,
mysore thorn,
nabalus alba,
naiad family,
native holly,
nero's crown,
nierembergia,
nuphar lutea,
oconee bells,
orange daisy,
orange grass,
oregon grape,
oyster plant,
painted leaf,
pansy orchid,
pansy violet,
panther lily,
pebble plant,
persian iris,
philadelphus,
phlox family,
phoenix tree,
pickerelweed,
pigeon berry,
pitcher sage,
poison-berry,
poison sumac,
polecat weed,
poppy mallow,
prairie crab,
prairie dock,
prairie star,
prickle-weed,
propitiatory,
purple anise,
purple avens,
purple cress,
pyrola minor,
rabbit brush,
ragged robin,
rainbow pink,
red amaranth,
red trillium,
red valerian,
rhododendron,
rhus typhina,
rocket cress,
roman nettle,
rosa banksia,
rosa odorata,
rose campion,
russian vine,
sacred lotus,
salad burnet,
sand verbena,
satin flower,
satyr orchid,
scarlet bush,
schomburgkia,
scilla verna,
scotch broom,
sea lavender,
sea milkwort,
serviceberry,
service tree,
shall-flower,
shamrock pea,
sheep laurel,
shell ginger,
shiny lyonia,
showy orchis,
sida spinosa,
sison amomum,
smooth sumac,
snail-flower,
snail flower,
snowy orchid,
spanish iris,
spiderflower,
spider plant,
sponge gourd,
spring heath,
spring vetch,
stagger bush,
star-thistle,
star begonia,
star ipomoea,
star jasmine,
strophanthus,
summer sweet,
sun marigold,
swallow wort,
swamp azalea,
swamp laurel,
swamp mallow,
sweet acacia,
sweet alison,
sweet cicely,
sweet reseda,
sweet rocket,
sweet sultan,
sweet violet,
sweet wattle,
thimbleberry,
tongueflower,
touch-me-not,
tree fuchsia,
true jasmine,
trumpet vine,
trumpet weed,
tufted vetch,
tulip orchid,
tulip poplar,
umbelliferae,
velvet plant,
velvet sumac,
venus's shoe,
vervain sage,
vicia cracca,
vincetoxicum,
vinegar tree,
viola blanda,
viola pedata,
water-shield,
water-target,
water carpet,
water dragon,
water orchid,
water violet,
white clover,
white cockle,
white madder,
white mallow,
white violet,
whortleberry,
wild parsnip,
wild quinine,
winter hazel,
winter heath,
winter sweet,
wood anemone,
wood cudweed,
xiphium iris,
yellow avens,
yellow bells,
yellow bugle,
youth-on-age,
yucca glauca,
zebra orchid
13 letters:
acanthocereus,
aeschynanthus,
african daisy,
african holly,
african tulip,
ajuga reptans,
albizia saman,
aletris aurea,
allspice tree,
alpine azalea,
alpine clover,
american aloe,
apple of peru,
aster shortii,
autumn crocus,
baby's breath,
ballota nigra,
balsaminaceae,
balsam family,
barrel cactus,
beach pancake,
bear's breech,
belle de nuit,
benjamin bush,
bergamot mint,
billy buttons,
black apricot,
black henbane,
bladder senna,
blind gentian,
blonde lilian,
blue fleabane,
blue toadflax,
bog pimpernel,
borage family,
bouncing bess,
bridal-wreath,
bridal wreath,
burmanniaceae,
burr marigold,
bush hibiscus,
butterfly pea,
cajanus cajan,
camphor daisy,
canada violet,
cape hyacinth,
cape marigold,
cape primrose,
carrot family,
century plant,
chamaecytisus,
chamois cress,
chaparral pea,
cherry laurel,
chiggerflower,
cinchona tree,
clammy locust,
climbing lily,
coast banksia,
coleus blumei,
common mallow,
common myrtle,
common teasel,
compass plant,
cornish heath,
corn marigold,
cottage tulip,
crape jasmine,
creeping lily,
creosote bush,
crepe jasmine,
cry-baby tree,
cuckoo flower,
culver's root,
curcuma longa,
cytisus albus,
dalea spinosa,
damask violet,
dame's violet,
daucus carota,
day jessamine,
delonix regia,
desert willow,
dimorphotheca,
dog's mercury,
dragon's head,
dwarf astilbe,
dwarf buckeye,
easter cactus,
egyptian bean,
elephant-tusk,
elephant tree,
english daisy,
erica arborea,
erica cinerea,
erigeron acer,
exacum affine,
ezo-yama-hagi,
fairy lantern,
false bugbane,
false heather,
fetid bugbane,
fiesta flower,
finger-flower,
fish geranium,
flaming poppy,
flowering ash,
foetid pothos,
forget-me-not,
garden violet,
genus abronia,
genus aerides,
genus amsonia,
genus anemone,
genus banksia,
genus bomarea,
genus brassia,
genus catalpa,
genus colutea,
genus corokia,
genus cyrilla,
genus dracula,
genus felicia,
genus francoa,
genus fuchsia,
genus fumaria,
genus hypoxis,
genus lewisia,
genus linaria,
genus logania,
genus malaxis,
genus mitella,
genus myrrhis,
genus nopalea,
genus olearia,
genus paeonia,
genus papaver,
genus primula,
genus quassia,
genus sophora,
genus syringa,
genus tellima,
geum strictum,
globe thistle,
goa bean vine,
golden thread,
golden wattle,
great lobelia,
great mullein,
green gentian,
ground cherry,
guinea flower,
hakea laurina,
hawk's-beards,
hazardia cana,
hedge mustard,
helmet flower,
helmet orchid,
hoary alyssum,
hog cranberry,
horsefly weed,
horse gentian,
hyacinth bean,
iceland poppy,
indian crocus,
indian mallow,
inflorescence,
ironwood tree,
jacob's staff,
japanese iris,
japanese rose,
jerusalem oak,
joseph's coat,
lagerstroemia,
laurel cherry,
leopard plant,
levant garlic,
listera ovata,
lizard's-tail,
lobster plant,
lonas inodora,
low blueberry,
lunaria annua,
lyonia lucida,
macadamia nut,
maltese cross,
malus ioensis,
mariposa lily,
marsh felwort,
marsh gentian,
marsh trefoil,
meadow beauty,
meadow bright,
meeting house,
mexican poppy,
michigan lily,
midsummer-men,
mint geranium,
mission bells,
morning glory,
mountain rose,
napaea dioica,
naples garlic,
nebraska fern,
night jasmine,
nodding onion,
nuphar advena,
nymphaea alba,
odontoglossum,
ononis repens,
orange balsam,
orchid cactus,
orchid family,
oregon myrtle,
ox-eyed daisy,
oxalis cernua,
packera aurea,
painted daisy,
panax ginseng,
papilionaceae,
paradise tree,
parrot's beak,
parrot's bill,
pepper family,
perennial pea,
persian lilac,
peruvian lily,
pickerel weed,
pigmy talinum,
pine hyacinth,
plantain lily,
pleurisy root,
pleurothallis,
plumeria alba,
pogonia rosea,
polemoniaceae,
polygala alba,
prairie berry,
prairie lotus,
prairie smoke,
prickly poppy,
primula veris,
protea family,
purple clover,
purple orchis,
quandong tree,
quassia amara,
red baneberry,
red bearberry,
red clintonia,
retama raetam,
rhus radicans,
ringworm bush,
rock geranium,
rosa moschata,
rose chestnut,
rose geranium,
rose of china,
runaway robin,
salvia clarea,
scaphosepalum,
scarlet plume,
scarlet sumac,
schinus molle,
schizopetalon,
schizophragma,
seaside mahoe,
shawnee salad,
shining sumac,
short's aster,
sickle medick,
silene dioica,
silver dollar,
silver wattle,
skunk cabbage,
smilax aspera,
soybean plant,
spanish broom,
spanish gorse,
spanish heath,
spathe flower,
spathiphyllum,
spider flower,
spider orchid,
spiny talinum,
spring beauty,
spring squill,
spurge laurel,
squirrel corn,
star magnolia,
stiff gentian,
stinking iris,
stokes' aster,
stone parsley,
strainer vine,
strangler fig,
streptocarpus,
summer cohosh,
summer savory,
swamp candles,
sweet alyssum,
sweet william,
syringa emodi,
tall crowfoot,
tamarind tree,
tangle orchid,
tansy ragwort,
tassel flower,
tinker's root,
tongue-flower,
tulip gentian,
turfing daisy,
umbrella tree,
viola odorata,
viola striata,
water lobelia,
water milfoil,
western poppy,
white campion,
white heather,
white lettuce,
white mullein,
white popinac,
white thistle,
whitlow grass,
whorled aster,
wild angelica,
wild cinnamon,
wild geranium,
wild tamarind,
winter savory,
wonder flower,
woodland star,
yellow locust,
yellow poplar,
yellow rocket,
yucca baccata
14 letters:
acacia catechu,
adenium obesum,
african violet,
allegheny vine,
alligator weed,
allium cernuum,
alpine anemone,
alpine besseya,
american agave,
american olive,
apple geranium,
aster falcatus,
australian pea,
avalanche lily,
babies'-breath,
baby blue-eyes,
balloon flower,
barbados pride,
bastard indigo,
batis maritima,
bed of flowers,
beggar's-ticks,
begonia dregei,
besseya alpina,
black knapweed,
black saltwort,
bladder ketmia,
bleeding heart,
bletia striata,
blighia sapida,
bloodwood tree,
blue-eyed mary,
blue columbine,
blue jessamine,
bomarea edulis,
bottle gentian,
boykinia elata,
bride's bonnet,
bristly locust,
brompton stock,
bryonia dioica,
buckwheat tree,
buffalo clover,
butterfly bush,
butterfly weed,
canary creeper,
cape jessamine,
carrion flower,
caryophyllidae,
cassia fistula,
cassia grandis,
cetonia aurata,
chaparral sage,
checkered lily,
chigger flower,
chincherinchee,
chinese privet,
chiococca alba,
chocolate root,
christmasberry,
christmas bush,
christmas rose,
christmas star,
christmas tree,
chrysosplenium,
cistus albidus,
cistus ladanum,
cleistes rosea,
cleome pinnata,
clinton's lily,
closed gentian,
coast boykinia,
common comfrey,
common dogbane,
common jasmine,
common mullein,
common ragweed,
common tobacco,
convolvulaceae,
coral necklace,
cotton thistle,
cranberry tree,
creeping bugle,
crepe gardenia,
crocus sativus,
crown imperial,
culvers physic,
cup and saucer,
curly clematis,
cushion flower,
cyperus longus,
cyrilla family,
dalmatian iris,
daphne cneorum,
datura arborea,
devil's apples,
dictamnus alba,
dogbane family,
drumstick tree,
dwarf bilberry,
echium vulgare,
egyptian onion,
emilia sagitta,
english violet,
epigaea repens,
equador laurel,
erica tetralix,
false alumroot,
false asphodel,
false foxglove,
false gromwell,
feabane mullet,
field bindweed,
field marigold,
field scabious,
firewheel tree,
flower cluster,
foetid bugbane,
foxtail orchid,
fragrant sumac,
francoa ramosa,
fraxinus ornus,
galium boreale,
galium mollugo,
garland flower,
genista raetam,
gentiana lutea,
gentian family,
genus agalinis,
genus ageratum,
genus alliaria,
genus alstonia,
genus amberboa,
genus ammobium,
genus angrecum,
genus apocynum,
genus baptisia,
genus boltonia,
genus boykinia,
genus brodiaea,
genus cassiope,
genus clitoria,
genus daviesia,
genus dicentra,
genus dillenia,
genus erigeron,
genus erysimum,
genus gerardia,
genus gesneria,
genus gloxinia,
genus goodyera,
genus harrisia,
genus hazardia,
genus helenium,
genus hesperis,
genus heuchera,
genus hibiscus,
genus kennedia,
genus kennedya,
genus laburnum,
genus lavatera,
genus leonurus,
genus pereskia,
genus phacelia,
genus phalaris,
genus photinia,
genus piqueria,
genus plumeria,
genus prunella,
genus psoralea,
genus sabbatia,
genus sidalcea,
genus thevetia,
genus tiarella,
genus vernonia,
genus veronica,
genus virgilia,
genus wisteria,
genus xanthium,
geranium molle,
german rampion,
geum triflorum,
glaux maritima,
globe amaranth,
golden heather,
golden ragwort,
golden trumpet,
grape hyacinth,
gray goldenrod,
greek valerian,
hamelia erecta,
hamelia patens,
he-huckleberry,
hedge bindweed,
hoary plantain,
hooker's onion,
horse chestnut,
horticulturist,
hound's-tongue,
huntsman's cup,
hybrid petunia,
ice-cream bean,
iliamna remota,
indian rhubarb,
indian tobacco,
inula helenium,
iris filifolia,
iris germanica,
iris kaempferi,
iris tingitana,
jacob's ladder,
jamestown weed,
japanese lilac,
japan allspice,
jerusalem sage,
jewels-of-opar,
john's cabbage,
johnny-jump-up,
jumping orchid,
kangaroo apple,
kirkia wilmsii,
lady's-eardrop,
lady's tresses,
leather flower,
lemaireocereus,
lipstick plant,
lonicera flava,
love-in-a-mist,
love-in-winter,
luther burbank,
lychnis dioica,
lyonia mariana,
malope trifida,
malva moschata,
malva neglecta,
mariposa tulip,
marmalade bush,
marsh clematis,
marsh marigold,
marsh milkweed,
marsh rosemary,
martynia annua,
marvel-of-peru,
matilija poppy,
matrimony vine,
meadow saffron,
meadow salsify,
mentha spicata,
mexican hyssop,
monarda didyma,
mountain avens,
mountain devil,
mountain ebony,
mountain grape,
mountain heath,
mountain phlox,
mountain pride,
mountain sumac,
mustard family,
native fuchsia,
nepeta cataria,
new york aster,
obedient plant,
ononis spinosa,
ophrys apifera,
orchis mascula,
oriental poppy,
orites excelsa,
oxalis caprina,
painted nettle,
painted tongue,
panama redwood,
paper mulberry,
peacock flower,
persian violet,
phacelia minor,
phantom orchid,
pheasant's-eye,
phlox subulata,
phytolaccaceae,
pineapple weed,
plantago media,
poison dogwood,
poison hemlock,
poison mercury,
poison parsley,
poker alumroot,
poker heuchera,
polygala lutea,
prairie mallow,
prairie mimosa,
prairie orchid,
prairie rocket,
pride-of-india,
prince's-plume,
prunus tenella,
prunus triloba,
purging cassia,
purple apricot,
purple boneset,
purple mullein,
purple sanicle,
queensland nut,
rainbow shower,
rattail cactus,
red bird's eye,
red periwinkle,
red sandalwood,
reseda odorata,
rhus aromatica,
rhus copallina,
ringworm shrub,
rivina humilis,
rock harlequin,
rock penstemon,
roman wormwood,
rosa pendulina,
rosebud cherry,
rosebud orchid,
rose of sharon,
rough bindweed,
rubus odoratus,
russian almond,
saffron crocus,
salvia reflexa,
scarlet bugler,
scarlet runner,
scented wattle,
scorpioid cyme,
scotch thistle,
scrub beefwood,
senecio aureus,
showy milkweed,
sickle alfalfa,
sickle lucerne,
silky wisteria,
snow-in-summer,
solanum nigrum,
solomon's-seal,
spanish dagger,
spike lavender,
staghorn sumac,
star saxifrage,
stingaree-bush,
striped violet,
st john's wort,
sundial lupine,
swamp milkweed,
sweet woodruff,
tall buttercup,
tall cupflower,
teucrium marum,
toothache tree,
traveler's joy,
tree celandine,
tree of heaven,
trumpet flower,
ulex europaeus,
umbrella plant,
vanda coerulea,
venetian sumac,
venus' slipper,
viola arvensis,
viola rostrata,
virgin's bower,
virginia stock,
wall germander,
wall pellitory,
water crowfoot,
water dropwort,
water hyacinth,
water plantain,
water shamrock,
weaver's broom,
western redbud,
white bedstraw,
white milkweed,
white wax tree,
wild buckwheat,
wild cranberry,
wild hollyhock,
wild sweet pea,
winged pigweed,
winter aconite,
winter jasmine,
woolly mullein,
woolly thistle,
yellow henbane,
yellow jasmine,
yellow parilla,
yellow trefoil,
yucca whipplei
15 letters:
abronia villosa,
acacia dealbata,
acanthus mollis,
acinos arvensis,
adlumia fungosa,
agave americana,
albizia lebbeck,
alligator grass,
american laurel,
anchusa riparia,
angel's trumpet,
arabian jasmine,
aster ericoides,
astrantia major,
ball nightshade,
baptisia lactea,
bear's breeches,
beefsteak plant,
belladonna lily,
bellis perennis,
berteroa incana,
bessera elegans,
bidens coronata,
bird's-eye bush,
black archangel,
black hellebore,
black horehound,
bladder campion,
blessed thistle,
blue-eyed grass,
blue elderberry,
blue marguerite,
bog rein orchid,
bower actinidia,
buckler mustard,
bush nasturtium,
butter-and-eggs,
butterfly plant,
cakile maritima,
california fern,
calla palustris,
camelina sativa,
canada moonseed,
cananga odorata,
canarybird vine,
canna generalis,
canterbury bell,
caoutchouc tree,
cape kafferboom,
cape periwinkle,
caragana sinica,
cardinal flower,
carlina acaulis,
cassia javonica,
cayenne jasmine,
celandine poppy,
centaurea nigra,
cestrum diurnum,
chilean jasmine,
chinese parasol,
christmas bells,
christmas berry,
clematis crispa,
clematis viorna,
cliff penstemon,
collinsia verna,
common flat pea,
common foxglove,
common hyacinth,
common milkwort,
common moonseed,
common purslane,
common valerian,
composite plant,
connemara heath,
coral bean tree,
coronilla varia,
crambe maritima,
cranberry heath,
crown of thorns,
culver's physic,
cydonia oblonga,
daffodil garlic,
daphne laureola,
daphne mezereum,
darmera peltata,
dirca palustris,
dishcloth gourd,
dolichos lablab,
dutchman's-pipe,
dwarf blueberry,
dyer's woodruff,
elderberry bush,
elephant's-foot,
eleusine indica,
emerald creeper,
encyclia venosa,
erica perspicua,
erysimum cheiri,
euphorbia milii,
evening lychnis,
false chamomile,
false miterwort,
false mitrewort,
family apiaceae,
family labiatae,
family rosaceae,
family rutaceae,
february daphne,
fetid horehound,
field speedwell,
flamboyant tree,
flame durrajong,
flannel mullein,
florentine iris,
flowering hazel,
flowering onion,
flowering shrub,
flowering stone,
fly honeysuckle,
fragrant orchid,
french lavender,
fumaria fungosa,
galax urceolata,
galium odoratum,
gentiana clausa,
genus aglaonema,
genus agrimonia,
genus angraecum,
genus asparagus,
genus astrantia,
genus baccharis,
genus burmannia,
genus callirhoe,
genus catasetum,
genus claytonia,
genus colubrina,
genus consolida,
genus coreopsis,
genus dalbergia,
genus digitalis,
genus dryadella,
genus epipactis,
genus erythrina,
genus gomphrena,
genus grevillea,
genus heracleum,
genus hermannia,
genus hybanthus,
genus hydrastis,
genus hypericum,
genus medinilla,
genus melastoma,
genus mertensia,
genus myristica,
genus myroxylon,
genus oenothera,
genus onopordon,
genus onopordum,
genus oxytropis,
genus peireskia,
genus penstemon,
genus polanisia,
genus rhipsalis,
genus xylomelum,
golden clematis,
golden ironweed,
gooseberry bush,
grass vetchling,
green hellebore,
habenaria nivea,
hamamelidanthum,
hibiscus elatus,
himalayan lilac,
homogyne alpina,
horseshoe vetch,
hot water plant,
humulus lupulus,
hungarian lilac,
huntsman's cups,
infant's-breath,
iowa crab apple,
iris florentina,
iris versicolor,
iris xiphioides,
jamaican cherry,
jamaica dogwood,
japanese privet,
japanese spurge,
jasmine tobacco,
jasminum sambac,
jerusalem thorn,
jupiter's beard,
kangaroo's-foot,
ladies'-eardrop,
ladies' tresses,
lady's-eardrops,
lady's earrings,
lathyrus vernus,
lavender cotton,
leaf-cutter bee,
lepidium alpina,
lesser centaury,
lesser galangal,
lesser knapweed,
leucaena glauca,
lilium candidum,
lilium martagon,
lilium superbum,
lindera benzoin,
liriope muscari,
listera cordata,
lobelia inflata,
lonicera dioica,
lycium barbarum,
mahonia nervosa,
mandevilla laxa,
manila tamarind,
marsh andromeda,
medicago sativa,
mentha piperita,
mentha pulegium,
mossy saxifrage,
mother of thyme,
mountain azalea,
mountain laurel,
mouse-ear cress,
mucuna aterrima,
multiflora rose,
muscari comosum,
myrrhis odorata,
myrtus communis,
nerium oleander,
nicotiana alata,
night jessamine,
nonesuch clover,
nutmeg geranium,
ochna serrulata,
old man's beard,
orange fleabane,
orange milkweed,
orange milkwort,
oxalis violacea,
pale coral root,
panax schinseng,
papaver alpinum,
paradise flower,
parkia javanica,
parry manzanita,
petunia hybrida,
pickaback plant,
pieris japonica,
piggyback plant,
pink fivecorner,
pink fritillary,
pinwheel flower,
poinciana regia,
pokeweed family,
polygala senega,
pongamia glabra,
prairie anemone,
prairie gentian,
prairie trefoil,
prenanthes alba,
primula elatior,
pueraria lobata,
purple amaranth,
purple clematis,
purple locoweed,
purple silkweed,
purple trillium,
red helleborine,
rhamnus croceus,
rheumatism weed,
ringworm cassia,
robinia hispida,
robinia viscosa,
rocket larkspur,
rosa eglanteria,
rosa multiflora,
rosa spithamaea,
rose globe lily,
rose of jericho,
rose periwinkle,
royal poinciana,
rubia tinctorum,
rudbeckia hirta,
running postman,
sambucus ebulus,
satureja acinos,
saucer magnolia,
scarlet hamelia,
scarlet lychnis,
scotch asphodel,
seashore mallow,
sedum telephium,
shoeblack plant,
silene uniflora,
silene vulgaris,
socotra begonia,
solanum crispum,
solidago rugosa,
spanish bayonet,
spurred gentian,
starfish flower,
stellaria media,
sticky geranium,
stinking clover,
stokesia laevis,
stone life face,
strawberry bush,
summer hyacinth,
sweet coltsfoot,
syringa josikea,
syringa persica,
syringa villosa,
tall bellflower,
tangier peavine,
tanner's cassia,
tassel hyacinth,
tellima affinis,
telopea oreades,
traveller's joy,
trillium family,
trumpet creeper,
tufted centaury,
tulipa clusiana,
turk's cap-lily,
venus's slipper,
veratrum viride,
viburnum opulus,
vigna caracalla,
viola conspersa,
viola pubescens,
viper's bugloss,
virginian stock,
virginian sumac,
virginia mallow,
water buttercup,
weigela florida,
white hellebore,
white horehound,
wild snapdragon,
yellow ageratum,
yellow asphodel,
yellow ironweed,
yellow milkwort,
yellow oleander,
yucca aloifolia,
yucca smalliana
16 letters:
abronia fragrans,
abronia maritima,
acacia pycnantha,
actinidia arguta,
ajuga genevensis,
albizzia lebbeck,
aletris farinosa,
alexandria senna,
allegheny spurge,
allium paradoxum,
allium tricoccum,
alpine coltsfoot,
alpinia speciosa,
alpinia zerumbet,
american bugbane,
american dogwood,
anagyris foetida,
anchusa capensis,
anemone nemorosa,
anthemis nobilis,
arachis hypogaea,
arctotis venusta,
arnoseris minima,
asperula odorata,
aster acuminatus,
astilbe japonica,
bastard feverfew,
bastard toadflax,
bedding geranium,
bells of ireland,
bird-on-the-wing,
bird of paradise,
black-eyed susan,
black fritillary,
black nightshade,
bletilla striata,
bloomeria crocea,
blunt-leaf heath,
bomarea salsilla,
bristly oxtongue,
brodiaea elegans,
burnet bloodwort,
bush honeysuckle,
butterfly flower,
butterfly orchid,
butterfly orchis,
calathian violet,
california olive,
california poppy,
caltha palustris,
camassia quamash,
campanula medium,
campsis radicans,
canary whitewood,
caricature plant,
carolina jasmine,
cattleya citrina,
celosia argentea,
celosia cristata,
centaurea cyanus,
centaurium minus,
cercis canadenis,
chaparral mallow,
chilean firebush,
chinese hibiscus,
chinese magnolia,
chinese pea tree,
chinese wistaria,
christmas cactus,
christmas flower,
cistus ladanifer,
cladrastis lutea,
clematis vitalba,
cleome serrulata,
climbing boneset,
clitoria mariana,
comandra pallida,
common allamanda,
common amsinckia,
common bearberry,
common buttercup,
common chickweed,
common cockscomb,
common horehound,
common snowberry,
common speedwell,
common vetchling,
confederate rose,
conium maculatum,
conradina glabra,
cordia alliodora,
corkscrew flower,
cornflower aster,
cornus sanguinea,
corydalis solida,
cotinus obovatus,
cuscuta gronovii,
cushion calamint,
datura sanguinea,
delairea odorata,
derris elliptica,
dipogon lignosus,
dryas octopetala,
dwarf nipplewort,
dyer's greenweed,
dyers' chamomile,
early coral root,
easter lily vine,
elegant brodiaea,
encelia farinosa,
encyclia citrina,
english hawthorn,
english lavender,
english primrose,
epacris impressa,
erica lusitanica,
erysimum asperum,
erythrina caffra,
erythrina indica,
european sanicle,
evergreen cherry,
false dragonhead,
false goatsbeard,
family gnetaceae,
family lamiaceae,
feather geranium,
firmiana simplex,
flowering almond,
frasera speciosa,
friendship plant,
fringed polygala,
fuchsia coccinea,
gardenia augusta,
gentiana acaulis,
gentiana crinita,
gentiana detonsa,
gentleman's-cane,
genus antennaria,
genus asphodelus,
genus aureolaria,
genus brunfelsia,
genus centaurium,
genus centrosema,
genus crotalaria,
genus desmanthus,
genus dipladenia,
genus eleocharis,
genus embothrium,
genus eupatorium,
genus foeniculum,
genus froelichia,
genus gaillardia,
genus gypsophila,
genus helianthus,
genus hylocereus,
genus indigofera,
genus levisticum,
genus lysimachia,
genus malvastrum,
genus mandevilla,
genus moehringia,
genus onobrychis,
genus parthenium,
genus polianthes,
genus prenanthes,
genus sagittaria,
genus sisymbrium,
genus wolffiella,
genus zygocactus,
geum virginianum,
giant willowherb,
gloriosa superba,
golden groundsel,
gold of pleasure,
granny's bonnets,
guinea gold vine,
hairy willowherb,
hakea leucoptera,
hanging geranium,
helicteres isora,
helleborus niger,
hibiscus trionum,
hippocastanaceae,
hoheria populnea,
hottonia inflata,
hummingbird moth,
hyoscyamus niger,
idesia polycarpa,
idria columnaris,
indian chickweed,
indian chocolate,
indian rattlebox,
ipomoea coccinea,
ipomoea purpurea,
ipomoea tricolor,
iresine herbstii,
italian woodbine,
jointed charlock,
jones' penstemon,
kalmia latifolia,
kalmia polifolia,
kingfisher daisy,
kniphofia uvaria,
lablab purpureus,
lace-flower vine,
ladies'-eardrops,
languas speciosa,
lavatera arborea,
leaf-cutting bee,
lesser celandine,
lesser twayblade,
lewisia rediviva,
liatris punctata,
lilium canadense,
lilium catesbaei,
lily of the nile,
linaria vulgaris,
linnaea borealis,
liparis loeselii,
lonicera hirsuta,
lotus americanus,
lupinus arboreus,
lupinus perennis,
macleaya cordata,
maidenhair berry,
malaxis-unifolia,
malva sylvestris,
marguerite daisy,
market gardening,
marsh bellflower,
matthiola incana,
meadow buttercup,
meadow goldenrod,
meadow saxifrage,
medicago arborea,
medicago falcata,
mesembryanthemum,
michaelmas daisy,
mikania scandens,
mirabilis jalapa,
mirabilis laevis,
mitella diphylla,
molucella laevis,
monarda punctata,
montia chamissoi,
mountain anemone,
narrow goldenrod,
native cranberry,
nelumbo nucifera,
nemophila aurita,
nymphaea odorata,
ocimum basilicum,
oenanthe crocata,
oncidium papilio,
ophrys muscifera,
order orchidales,
order umbellales,
papaver argemone,
para rubber tree,
penstemon dolius,
penstemon parryi,
periploca graeca,
physalis viscosa,
picris echioides,
pigeon-pea plant,
pincushion hakea,
pink paper daisy,
pink shower tree,
portuguese heath,
prairia sabbatia,
prairie trillium,
pride of bolivia,
primula vulgaris,
prince's-feather,
princess feather,
privet andromeda,
proboscis flower,
protea mellifera,
prunus dasycarpa,
purple saxifrage,
pyrola americana,
pyrola elliptica,
pyrularia pubera,
radyera farragei,
ranunculus acris,
red false mallow,
ribes uva-crispa,
roast beef plant,
robin's plantain,
romneya coulteri,
salvia farinacea,
salvia pratensis,
salvia verbenaca,
santa maria tree,
sassafras laurel,
satureia montana,
satureja montana,
saururus cernuus,
scarlet clematis,
seneca snakeroot,
senecio cruentus,
senecio jacobaea,
senecio vulgaris,
senega snakeroot,
seneka snakeroot,
senna auriculata,
sessile trillium,
shepherd's clock,
silene latifolia,
silene virginica,
silver lace vine,
simarouba glauca,
siskiyou lewisia,
snowdrop anemone,
solandra guttata,
solidago bicolor,
sophora japonica,
sophora sinensis,
spartium junceum,
spring vetchling,
stanleya pinnata,
starry saxifrage,
stinking gladwyn,
strawberry blite,
strawberry shrub,
subclass rosidae,
summer snowflake,
sweet pepperbush,
swertia perennia,
swertia speciosa,
syringa josikaea,
syringa vulgaris,
texas bluebonnet,
thunbergia alata,
tinnevelly senna,
trailing arbutus,
tree of the gods,
trifolium dubium,
trifolium repens,
trillium erectum,
trillium sessile,
tropaeolum majus,
tropaeolum minus,
tussilago alpina,
urginea maritima,
vegetable oyster,
viminaria juncea,
viola canadensis,
viorna baldwinii,
virginia cowslip,
whispering bells,
white dipladenia,
white fritillary,
white globe lily,
white snapdragon,
white wood aster,
whorled milkweed,
wild meadow lily,
wild yellow lily,
wisteria venusta,
woody nightshade,
yellow chamomile,
yellow clintonia,
yellow colicroot,
yellow jacaranda,
yellow jessamine,
yellow pimpernel,
yellow pond lily,
yellow vetchling,
yucca brevifolia
17 letters:
abronia elliptica,
abronia latifolia,
abronia umbellata,
acacia farnesiana,
achillea ptarmica,
aconitum napellus,
ajuga chamaepitys,
alexandrian senna,
allium acuminatum,
amberboa moschata,
american barberry,
american feverfew,
american wistaria,
american wisteria,
amorpha canescens,
amorpha fruticosa,
anagallis tenella,
annunciation lily,
antennaria dioica,
antirrhinum majus,
aplectrum hyemale,
argemone mexicana,
asphodeline lutea,
aster divaricatus,
aster novi-belgii,
astilbe biternata,
atriplex mexicana,
atropa belladonna,
autumn sneezeweed,
bachelor's button,
barbarea vulgaris,
bartram juneberry,
bauhinia monandra,
begonia cocchinea,
begonia socotrana,
bermuda buttercup,
bicolor lespediza,
blue african lily,
blue false indigo,
brassia verrucosa,
brassica oleracea,
brisbane quandong,
bumelia lycioides,
california beauty,
california laurel,
california privet,
california redbud,
calochortus albus,
calystegia sepium,
camellia japonica,
canadian fleabane,
canarybird flower,
candlestick tulip,
canella winterana,
carolina allspice,
cascade penstemon,
cassia acutifolia,
cassia auriculata,
centranthus ruber,
cestrum nocturnum,
chelidonium majus,
china fleece vine,
christmas begonia,
cinchona calisaya,
circaea lutetiana,
clematis texensis,
clethra alnifolia,
climbing fumitory,
climbing hempweed,
clitoria turnatea,
cnicus benedictus,
codlins-and-cream,
collinsia bicolor,
common coral tree,
common gum cistus,
common nightshade,
consolida ambigua,
conyza canadensis,
coral honeysuckle,
cotinus coggygria,
curcuma domestica,
cytisus scoparius,
datura stramonium,
datura suaveolens,
deadly nightshade,
decumaria barbara,
decumaria barbata,
delphinium ajacis,
desert paintbrush,
dianthus barbatus,
dianthus supurbus,
dipsacus fullonum,
dolichos lignosus,
dotted gayfeather,
elegant habenaria,
eranthis hyemalis,
eriogonum allenii,
erysimum allionii,
euphorbia fulgens,
european dogtooth,
fabiana imbricata,
false dragon head,
false rue anemone,
false wintergreen,
family cruciferae,
family lennoaceae,
family lythraceae,
family naiadaceae,
family najadaceae,
family piperaceae,
family proteaceae,
few-flowered leek,
fine-leaved heath,
flower-of-an-hour,
flowering tobacco,
fragrant bedstraw,
fraxinus dipetala,
gall of the earth,
garden heliotrope,
garden nasturtium,
genista hispanica,
genista tinctoria,
gentiana calycosa,
genus abelmoschus,
genus antirrhinum,
genus arabidopsis,
genus asphodeline,
genus calandrinia,
genus calceolaria,
genus cheiranthus,
genus conospermum,
genus gentianella,
genus gymnocladus,
genus haplopappus,
genus helichrysum,
genus lagenophera,
genus masdevallia,
genus saintpaulia,
genus sarcochilus,
genus schizanthus,
genus sphaeralcea,
genus stizolobium,
geranium pratense,
gloxinia perennis,
gloxinia spesiosa,
golden marguerite,
gomphrena globosa,
greater celandine,
grevillea banksii,
grevillea robusta,
griselinia lucida,
guinea-hen flower,
habenaria bifolia,
habenaria elegans,
habenaria greenei,
hairy darling pea,
hairy honeysuckle,
hakea lissosperma,
hatiora gaertneri,
hedysarum boreale,
hibiscus farragei,
hibiscus syriacus,
hoary golden bush,
holly-leaf cherry,
hydrangea anomala,
hypericum ascyron,
iliamna ruvularis,
illicium anisatum,
indian coral tree,
indian paintbrush,
inward-developing,
ipomoea quamoclit,
iris foetidissima,
japanese allspice,
japanese wistaria,
kennedia coccinea,
lady-of-the-night,
lambertia formosa,
larrea tridentata,
lathyrus nissolia,
lathyrus odoratus,
leonurus cardiaca,
lespedeza bicolor,
lewisia cotyledon,
ligustrum lucidum,
lilium pardalinum,
lily of the incas,
livingstone daisy,
lobelia dortmanna,
lonicera japonica,
lonicera morrowii,
lotus berthelotii,
lowbush penstemon,
lychnis coronaria,
lycopus europaeus,
lyonia ligustrina,
lythrum salicaria,
magnolia stellata,
marrubium vulgare,
meadow cranesbill,
medicago lupulina,
mentha longifolia,
meryta sinclairii,
mexican flameleaf,
mitella pentandra,
montia cordifolia,
mountain clematis,
muscari neglectum,
nepeta hederaceae,
new england aster,
nicotiana tabacum,
nigella damascena,
nolina microcarpa,
northern bedstraw,
oakleaf goosefoot,
oenothera biennis,
old-maid's bonnet,
order gentianales,
our lord's candle,
oxalis acetosella,
oxalis pes-caprae,
papaver nudicaule,
papaver orientale,
paris quadrifolia,
parry's penstemon,
penstemon deustus,
penstemon palmeri,
pereskia aculeata,
petunia axillaris,
phlomis fruticosa,
pieris floribunda,
pilea involucrata,
pink sand verbena,
platanus racemosa,
plumbago europaea,
polygala vulgaris,
poor man's orchid,
pride of barbados,
pritzelago alpina,
protea cynaroides,
prunus glandulosa,
prunus ilicifolia,
pudding pipe tree,
pulsatilla patens,
purple milk vetch,
purple nightshade,
quamoclit pennata,
queen anne's lace,
rat's-tail cactus,
rayless chamomile,
redwood penstemon,
red morning-glory,
red osier dogwood,
ribes grossularia,
sabinea carinalis,
salvia lancifolia,
sambucus caerulea,
sanicula europaea,
satureja vulgaris,
scabiosa arvensis,
scented penstemon,
scentless hayweed,
scentless mayweed,
seabeach sandwort,
senecio glabellus,
senna alexandrina,
senna obtusifolia,
shrubby penstemon,
siberian pea tree,
sleeping hibiscus,
sneezeweed yarrow,
solanum aviculare,
solanum dulcamara,
solanum giganteum,
solanum jasmoides,
solanum rostratum,
southern harebell,
southern magnolia,
sparaxis tricolor,
spergularia rubra,
spergula arvensis,
sphacele calycina,
spiranthes cernua,
spreading dogbane,
spreading pogonia,
star-leaf begonia,
star-of-bethlehem,
star of the veldt,
sulfur paintbrush,
swainsona greyana,
swamp honeysuckle,
swamp rose mallow,
syrian bean caper,
tall white violet,
tamarindus indica,
tofieldia pusilla,
tolmiea menziesii,
trifoliate orange,
trifolium alpinum,
tussilago farfara,
umbrella magnolia,
urtica pipulifera,
verbascum thapsus,
veronica agrestis,
violet suksdorfia,
virgilia capensis,
virginia bluebell,
water gillyflower,
western saxifrage,
white dead nettle,
white honeysuckle,
winter heliotrope,
xerophyllum tenax,
xylosma congestum,
yellow globe lily,
yellow water lily,
yucca carnerosana,
zigadenus elegans,
zigadenus glaucus,
zonal pelargonium
18 letters:
acroclinium roseum,
agastache mexicana,
agrostemma githago,
alaska rein orchid,
alexandrian laurel,
allionia incarnata,
alstonia scholaris,
althea officinalis,
american brooklime,
american germander,
american hellebore,
american smokewood,
american spicebush,
andrew's clintonia,
anemone pulsatilla,
anemone sylvestris,
anemone tetonensis,
angel-wing begonia,
anthemis tinctoria,
anthericum liliago,
anthericum torreyi,
aquilegia coerulia,
aquilegia vulgaris,
arabidopsis lyrata,
araujia sericofera,
arenaria peploides,
asclepias albicans,
asclepias speciosa,
asclepias tuberosa,
asperula tinctoria,
aster linarifolius,
aster ptarmicoides,
astragalus danicus,
baptisia australis,
baptisia tinctoria,
bauhinia variegata,
beach sand verbena,
beefsteak geranium,
begonia cheimantha,
benzoin odoriferum,
bird's-foot violet,
brasenia schreberi,
brugmansia arborea,
california fuchsia,
callirhoe digitata,
calochortus luteus,
calophyllum calaba,
camphor dune tansy,
canadian goldenrod,
cape forget-me-not,
carnegiea gigantea,
castilleja miniata,
catananche caerula,
centaurea moschata,
cercidium floridum,
checkered daffodil,
cheiranthus cheiri,
chenopodium botrys,
chilopsis linearis,
cimicifuga foetida,
cinchona pubescens,
clematis baldwinii,
clematis tangutica,
cleome hassleriana,
clianthus formosus,
clianthus puniceus,
climbing corydalis,
climbing hemp-vine,
climbing hydrangea,
clintonia borealis,
clintonia uniflora,
coast rhododendron,
common rose mallow,
common thorn apple,
common wood sorrel,
convolvulus sepium,
coreopsis maritima,
cornus stolonifera,
cotinus americanus,
crataegus coccinea,
creeping snowberry,
crested coral root,
cross-leaved heath,
crown-of-the-field,
cultivated cabbage,
cynara cardunculus,
dalmatian laburnum,
dense blazing star,
dianthus chinensis,
dianthus deltoides,
dianthus plumarius,
diervilla lonicera,
digitalis purpurea,
elegant cat's ears,
encyclia tampensis,
epidendrum venosum,
epilobium hirsutum,
erodium cicutarium,
european brooklime,
evergreen magnolia,
everlasting flower,
explorer's gentian,
family apocynaceae,
family dipsacaceae,
family orchidaceae,
family oxalidaceae,
family trilliaceae,
felicia amelloides,
felicia bergeriana,
florist's gloxinia,
flowers-of-an-hour,
flower arrangement,
fool's huckleberry,
fraxinus cuspidata,
french honeysuckle,
fritillaria mutica,
galega officinalis,
galeopsis tetrahit,
galtonia candicans,
gardener's delight,
gentiana andrewsii,
genus anigozanthus,
genus aphyllanthes,
genus callistephus,
genus chimonanthus,
genus corallorhiza,
genus hardenbergia,
genus hemerocallis,
genus leucadendron,
genus lonchocarpus,
genus nierembergia,
genus rhododendron,
genus salpiglossis,
genus schomburgkia,
genus vincetoxicum,
geranium maculatum,
gerardia virginica,
glycyrrhiza glabra,
golden everlasting,
golden honey plant,
golden shower tree,
grape-leaf begonia,
greater masterwort,
greater stitchwort,
gutierrezia texana,
gymnocladus dioica,
habenaria dilatata,
habenaria psycodes,
hamamelis vernalis,
helenium autumnale,
helleborus viridis,
hemerocallis flava,
heuchera americana,
heuchera sanguinea,
hevea brasiliensis,
hibiscus mutabilis,
hippocrepis comosa,
hot-rock penstemon,
hottonia palustris,
hudsonia ericoides,
hymenaea courbaril,
hyssop loosestrife,
iliamna acerifolia,
impatiens capensis,
iresine reticulata,
japanese andromeda,
kennedia prostrata,
lathyrus japonicus,
lathyrus maritimus,
lathyrus palustris,
lathyrus pratensis,
lathyrus splendens,
lavandula stoechas,
lesser wintergreen,
leucothoe editorum,
leucothoe racemosa,
lilium columbianum,
lilium lancifolium,
lilium longiflorum,
lily of the valley,
linaria canadensis,
lobelia cardinalis,
lobularia maritima,
lonicera albiflora,
lonicera xylosteum,
loosestrife family,
low-bush blueberry,
lychins floscuculi,
lycopus virginicus,
lysimachia nemorum,
macadamia nut tree,
madagascar jasmine,
magnolia tripetala,
mahonia aquifolium,
malcolmia maritima,
maple-leaf begonia,
maple-leaved bayur,
melancholy thistle,
mentzelia lindleyi,
mirabilis uniflora,
mountain andromeda,
mountain hollyhock,
mucuna deeringiana,
muntingia calabura,
myosotis sylvatica,
nemophila maculata,
nodding wild onion,
nuytsia floribunda,
old-field toadflax,
ophrys insectifera,
orchidaceous plant,
orchis spectabilis,
oregon holly grape,
ormosia monosperma,
orontium aquaticum,
outward-developing,
papaver somniferum,
parietaria difussa,
penstemon barbatus,
penstemon rupicola,
pericallis cruenta,
petasites fragrans,
petasites hybridus,
petasites vulgaris,
phacelia whitlavia,
pholistoma auritum,
piscidia erythrina,
piscidia piscipula,
pogonia divaricata,
poison arrow plant,
polemonium boreale,
polygonum aubertii,
pontederia cordata,
portulaca oleracea,
port jackson heath,
prairie wake-robin,
prunus subhirtella,
psychopsis papilio,
purple loosestrife,
purslane speedwell,
queen of the night,
rampion bellflower,
ranunculus ficaria,
rattlesnake orchid,
redstem storksbill,
resurrection plant,
richea dracophylla,
rosebay willowherb,
rudbeckia serotina,
salvia leucophylla,
saponaria vaccaria,
satureia hortensis,
satureja douglasii,
satureja hortensis,
saxifraga aizoides,
scarlet fritillary,
scentless camomile,
scleranthus annuus,
shaving-brush tree,
sida hermaphrodita,
silene caroliniana,
sinningia speciosa,
smooth darling pea,
solanum wendlandii,
solidago nemoralis,
sophora tetraptera,
southern buckthorn,
sphaeralcea remota,
spiked loosestrife,
spiraea prunifolia,
spotted coral root,
spotted cranesbill,
st. dabeoc's heath,
st. peter's wreath,
stapelias asterias,
stellaria holostea,
stinking horehound,
strawberry pigweed,
strelitzia reginae,
striped coral root,
sturt's desert pea,
styphelia triflora,
st andrews's cross,
subularia aquatica,
sweet four o'clock,
sweet sand verbena,
sweet white violet,
syringa reticulata,
talinum spinescens,
templetonia retusa,
tetragonia expansa,
teucrium canadense,
texas purple spike,
thespesia populnea,
thevetia peruviana,
tickseed sunflower,
trailing windmills,
trifolium pratense,
tussock bellflower,
upland white aster,
vaccaria hispanica,
vernal witch hazel,
veronica americana,
veronica peregrina,
vigna aconitifolia,
viminaria denudata,
violet wood sorrel,
virgilia oroboides,
virginia waterleaf,
weeping tree broom,
western crab apple,
white-topped aster,
white false indigo,
white horse nettle,
white trumpet lily,
wild morning-glory,
wisteria chinensis,
wood-sorrel family,
xeranthemum annuum,
yellow honeysuckle,
yellow paper daisy,
zygophyllum fabago
19 letters:
aconitum lycoctonum,
adenium multiflorum,
ailanthus altissima,
albizia julibrissin,
alderleaf juneberry,
allium ampeloprasum,
allium neopolitanum,
alpinia officinalis,
alpinia officinarum,
amaranthus cruentus,
american dog violet,
american pennyroyal,
american pulsatilla,
amorpha californica,
anchusa officinalis,
andromeda polifolia,
anemone ludoviciana,
angelica sylvestris,
antirrhinum filipes,
aristolochia durior,
asclepias incarnata,
aspalathus linearis,
aster novae-angliae,
astroloma humifusum,
australian chestnut,
barbados gooseberry,
berberis canadensis,
bidens trichosperma,
bocconia frutescens,
bottlebrush buckeye,
brassia lawrenceana,
broad-leaved montia,
bursera microphylla,
cabomba caroliniana,
calandrinia ciliata,
california allspice,
california bay tree,
california bluebell,
california sycamore,
calochortus amoenus,
calochortus elegans,
campanula americana,
campanula carpatica,
campanula glomerata,
cardamine douglasii,
cascade everlasting,
cassia augustifolia,
castilleja chromosa,
catharanthus roseus,
cephalanthera rubra,
cercis occidentalis,
chamaemelum nobilis,
cheiranthus asperus,
chenopodium glaucum,
chilean flameflower,
chinese scholartree,
cinchona ledgeriana,
circis siliquastrum,
cirsium helenioides,
cladrastis kentukea,
clatonia lanceolata,
claytonia virginica,
cleistes divaricata,
clematis versicolor,
clematis virginiana,
clianthus speciosus,
climbing nightshade,
clinopodium vulgare,
coastal rein orchid,
coeloglossum viride,
colchicum autumnale,
columbia tiger lily,
colutea arborescens,
common bog rosemary,
common devil's claw,
common four-o'clock,
comptonia peregrina,
confederate jasmine,
convallaria majalis,
coptis groenlandica,
cordyline australis,
coreopsis tinctoria,
cotoneaster dammeri,
crataegus laevigata,
crataegus oxycantha,
creeping bellflower,
cynoglossum amabile,
cyrilla racemiflora,
cytisus multiflorus,
cytisus ramentaceus,
daboecia cantabrica,
dancing lady orchid,
desert four o'clock,
desert sand verbena,
dianthus latifolius,
dicentra canadensis,
dicentra cucullaria,
dichondra micrantha,
dipsacus sylvestris,
downy yellow violet,
dutchman's breeches,
early purple orchid,
east indian rosebay,
eichhornia spesiosa,
elaeocarpus grandis,
epacris obtusifolia,
epidendrum tampense,
erigeron canadensis,
erigeron pulchellus,
erysimum arkansanum,
erythrina variegata,
erythronium albidum,
european white lily,
false baby's breath,
family boraginaceae,
family brassicaceae,
family cyrilliaceae,
family gentianaceae,
family papilionacea,
family umbelliferae,
flowering raspberry,
footsteps-of-spring,
fragrant water lily,
fritillaria affinis,
fritillaria biflora,
fritillaria recurva,
fuchsia excorticata,
fumaria claviculata,
fumaria officinalis,
genus acanthocereus,
genus chamaecytisus,
genus dimorphotheca,
genus lagerstroemia,
genus scaphosepalum,
genus schizopetalon,
genus schizophragma,
germander speedwell,
glechoma hederaceae,
green adder's mouth,
gymnadenia conopsea,
habenaria albiflora,
habenaria fimbriata,
habenaria peramoena,
hedeoma pulegioides,
hesperis matronalis,
heuchera cylindrica,
hexalectris spicata,
hibiscus moscheutos,
holly-leaved cherry,
hypericum calycinum,
illicium floridanum,
indian rhododendron,
isopyrum biternatum,
italian honeysuckle,
ivy-leaved geranium,
japanese tree lilac,
jasminum nudiflorum,
jasminum officinale,
kalmia angustifolia,
kangaroo-foot plant,
kentucky yellowwood,
kolkwitzia amabilis,
lamium amplexicaule,
large white petunia,
lathyrus latifolius,
lathyrus sylvestris,
lavandula latifolia,
ledum groenlandicum,
lepechinia calycina,
leycesteria formosa,
ligustrum japonicum,
lilium michiganense,
lithophragma affine,
lobelia siphilitica,
long-spurred violet,
lonicera canadensis,
lupinus subcarnosus,
lychnis flos-cuculi,
lycium carolinianum,
lycium halimifolium,
magnolia virginiana,
matricaria inodorum,
meconopsis cambrica,
medinilla magnifica,
melissa officinalis,
mertensia virginica,
mexican tulip poppy,
mother-of-thousands,
mountain blue berry,
mountain fetterbush,
myosotis scorpiodes,
narcissus jonquilla,
nemophila menziesii,
new zealand spinach,
nierembergia repens,
northern dune tansy,
nyctaginia capitata,
onopordon acanthium,
onopordum acanthium,
opuntia lindheimeri,
oxydendrum arboreum,
oxytropis lambertii,
panama redwood tree,
panax pseudoginseng,
parkinsonia florida,
parnassia fimbriata,
parnassia palustris,
parochetus communis,
penstemon newberryi,
penstemon rydbergii,
petteria ramentacea,
phaseolus caracalla,
phaseolus coccineus,
phyllodoce caerulea,
pickeringia montana,
pimenta officinalis,
platanthera bifolia,
poinciana gilliesii,
polianthes tuberosa,
polygala paucifolia,
polygonum fagopyrum,
polygonum orientale,
poncirus trifoliata,
pride of california,
prunus laurocerasus,
pulsatilla vulgaris,
purple poppy mallow,
pyrola rotundifolia,
ranunculus bulbosus,
red angel's trumpet,
rhododendron maxima,
rydberg's penstemon,
sabbatia campestris,
sagebrush buttercup,
salicornia europaea,
sarracenia purpurea,
saxifraga granulata,
saxifraga hypnoides,
saxifraga stellaris,
scarlet musk flower,
scarlet runner bean,
scolymus hispanicus,
shortia galacifolia,
silphium laciniatum,
sisymbrium barbarea,
smilax rotundifolia,
snowdrop windflower,
solanum carolinense,
solenostemon blumei,
solidago canadensis,
solidago spathulata,
sparmannia africana,
spiranthes spiralis,
spraguea umbellatum,
sterculia rupestris,
stinking nightshade,
strawberry geranium,
styphelia humifusum,
symphoricarpos alba,
symplocus tinctoria,
talinum brevifolium,
talinum paniculatum,
tanacetum balsamita,
tanacetum coccineum,
tanacetum douglasii,
tansy-leaved rocket,
tellima grandiflora,
teucrium chamaedrys,
teucrium scorodonia,
thanksgiving cactus,
thevetia neriifolia,
tiarella unifoliata,
trillium recurvatum,
trumpet honeysuckle,
vaccaria pyramidata,
verbascum blattaria,
verbascum lychnitis,
verbesina virginica,
veronica beccabunga,
veronica chamaedrys,
viccinium myrtillus,
vincetoxicum negrum,
virgilia divaricata,
virginia crownbeard,
western wall flower,
west indian jasmine,
whipple's penstemon,
white cinnamon tree,
white fairy lantern,
white prairie aster,
white spanish broom,
wisteria floribunda,
wisteria frutescens,
yellow giant hyssop,
yellow sand verbena
20 letters:
abutilon theophrasti,
adenanthera pavonina,
agapanthus africanus,
agastache nepetoides,
albizzia julibrissin,
allamanda cathartica,
alsobia dianthiflora,
amaryllis belladonna,
american featherfoil,
amphicarpa bracteata,
amsinckia intermedia,
anemone quinquefolia,
anthyllis vulneraria,
aquilegia canadensis,
arabidopsis thaliana,
aureolaria virginica,
banksia integrifolia,
begonia tuberhybrida,
biscutalla laevigata,
blue cardinal flower,
brugmansia sanguinea,
brunfelsia americana,
bryanthus taxifolius,
caesalpinia sepiaria,
caladenia cairnsiana,
california buckwheat,
calochortus amabilis,
calochortus kennedyi,
calycanthus floridus,
campanula divaricata,
campanula rapunculus,
campanula trachelium,
caragana arborescens,
cassiope mertensiana,
castilleja sulphurea,
centaurea imperialis,
centauria calcitrapa,
centaurium calycosum,
cerastium tomentosum,
cheiranthus allionii,
chimaphila corymbosa,
chimaphila umbellata,
chimonanthus praecox,
chinese parasol tree,
chinese scholar tree,
cimicifuga americana,
cinchona officinalis,
cirsium heterophylum,
cliftonia monophylla,
clustered bellflower,
collinsia parviflora,
common morning glory,
common pitcher plant,
common unicorn plant,
convolvulus arvensis,
corallorhiza striata,
corallorhiza trifida,
creeping wintergreen,
dactylorhiza fuchsii,
davidson's penstemon,
dicentra spectabilis,
dove's foot geranium,
dwarf russian almond,
eburophyton austinae,
eichhornia crassipes,
embothrium coccineum,
epacris purpurascens,
episcia dianthiflora,
erigeron aurantiacus,
eriocaulon aquaticum,
erythrina lysistemon,
erythronium montanum,
eupatorium purpureum,
european honeysuckle,
eustoma grandiflorum,
fagopyrum esculentum,
fair-maids-of-france,
family balsaminaceae,
family burmanniaceae,
family polemoniaceae,
fouquieria splendens,
fringed poppy mallow,
fritillaria agrestis,
fumaria sempervirens,
gardenia jasminoides,
garden forget-me-not,
gaultheria hispidula,
gaylussacia frondosa,
gelechia gossypiella,
gentianella amarella,
gentianopsis crinita,
gentianopsis detonsa,
genus chrysosplenium,
genus lemaireocereus,
geranium robertianum,
gerardia pedicularia,
giant potato creeper,
giant red paintbrush,
gill-over-the-ground,
golden barrel cactus,
golden fairy lantern,
graptophyllum pictum,
great solomon's-seal,
great st john's wort,
great yellow gentian,
grevillela parallela,
habenaria chlorantha,
habenaria leucophaea,
habenaria orbiculata,
haemanthus coccineus,
hamamelis virginiana,
hedysarum coronarium,
himalaya honeysuckle,
hippeastrum puniceum,
hyacinthus candicans,
hypericum prolificum,
indigofera tinctoria,
japanese honeysuckle,
japanese pagoda tree,
kentucky coffee tree,
lalthyrus tingitanus,
leonotis nepetifolia,
leucanthemum vulgare,
liatris pycnostachya,
lilies of the valley,
linanthus dichotomus,
lithophragma affinis,
lonicera caprifolium,
lonicera involucrata,
lychins chalcedonica,
lythrum hyssopifolia,
macadamia ternifolia,
magnolia grandiflora,
magnolia macrophylla,
magnolia soulangiana,
malvastrum coccineum,
marsh st-john's wort,
mentzelia livicaulis,
menziesia ferruginea,
mercurialis perennis,
micromeria douglasii,
mirabilis longiflora,
mirabilis multiflora,
molluga verticillata,
moreton bay chestnut,
morning-glory family,
morrow's honeysuckle,
nabalus serpentarius,
nepal trumpet flower,
nicandra physaloides,
oak-leaved goosefoot,
orchis papilionaceae,
osmanthus americanus,
painted-leaf begonia,
papaver californicum,
parkinsonia aculeata,
peacock flower fence,
pelargonium hortorum,
pelargonium peltatum,
penstemon cyananthus,
penstemon davidsonii,
penstemon fruticosus,
penstemon serrulatus,
peruvian mastic tree,
petunia integrifolia,
photinia arbutifolia,
phytolacca americana,
pithecellobium dulce,
platylobium formosum,
poisonous nightshade,
polemonium caeruleum,
polygonatum biflorum,
poterium sanguisorba,
purple-hooded orchis,
queen's crape myrtle,
ranunculus aquatilis,
rattlesnake plantain,
robinia pseudoacacia,
rubus phoenicolasius,
saint-bernard's-lily,
saintpaulia ionantha,
saint peter's wreath,
salpiglossis sinuata,
sanicula arctopoides,
sarcochilus falcatus,
satureja grandiflora,
senecio milkanioides,
sesbania grandiflora,
siberian wall flower,
silver-leaved nettle,
silver quandong tree,
sophora secundiflora,
spanish oyster plant,
sphaeralcea coccinea,
spreading bellflower,
stenocarpus salignus,
stenocarpus sinuatus,
sterculia acerifolia,
strawberry saxifrage,
subclass hamamelidae,
suksdorfia violaceae,
symphytum officinale,
tall field buttercup,
tephrosia virginiana,
thin-leaved bilberry,
toxicodendron vernix,
tragopogon pratensis,
transvaal kafferboom,
uvularia grandiflora,
verbascum phoeniceum,
veronica officinalis,
white fringed orchid,
white fringed orchis,
zygocactus truncatus
21 letters:
allium cepa viviparum,
amelanchier alnifolia,
american pasqueflower,
anemopsis californica,
anthyllis barba-jovis,
apalachicola rosemary,
ariocarpus fissuratus,
asclepias curassavica,
australian grass tree,
australian sword lily,
begonia heracleifolia,
begonia semperflorens,
black-eyed susan vine,
blooming-fool begonia,
boykinia occidentalis,
brazilian pepper tree,
brugmansia suaveolens,
caesalpinia gilliesii,
california tree poppy,
callirhoe involucrata,
callirhoe triangulata,
calochortus nuttallii,
campanula aparinoides,
catasetum macrocarpum,
centaurium scilloides,
chenopodium capitatum,
chinese forget-me-not,
chrysanthemum segetum,
claytonia caroliniana,
clintonia andrewsiana,
colorado four o'clock,
combretum appiculatum,
common grape hyacinth,
common matrimony vine,
common spotted orchid,
common st john's wort,
convolvulus scammonia,
corallorhiza maculata,
corydalis claviculata,
crataegus biltmoreana,
crataegus pedicellata,
cyclamen hederifolium,
cyclamen neopolitanum,
cyclamen purpurascens,
desert mariposa tulip,
desmanthus ilinoensis,
dianthus caryophyllus,
dutch case-knife bean,
eastern pasque flower,
echinocactus grusonii,
emmanthe penduliflora,
epilobium canum canum,
epipactis helleborine,
erigonum fasciculatum,
euphorbia helioscopia,
euphorbia pulcherrima,
european pasqueflower,
family convolvulaceae,
family phytolaccaceae,
five-flowered gentian,
flowering wintergreen,
fouquieria columnaris,
fritillaria liliaceae,
fritillaria meleagris,
fritillaria micrantha,
gaultheria procumbens,
gentiana pneumonanthe,
gentiana quinquefolia,
genus hamamelidanthum,
geoffroea decorticans,
geranium richardsonii,
gleditsia triacanthos,
gnaphalium sylvaticum,
gypsophila paniculata,
hamamelid dicot genus,
helleborus orientalis,
heracleum sphondylium,
hexalectris warnockii,
holly-leaves barberry,
horse-chestnut family,
hyacinthus orientalis,
hydrilla verticillata,
hypericum androsaemum,
hypericum crux andrae,
hypericum pyramidatum,
hypericum spathulatum,
hypericum virginianum,
japanese varnish tree,
large-leaved magnolia,
lavandula officinalis,
leatherleaf saxifrage,
leonotis nepetaefolia,
lesser yellow trefoil,
leucaena leucocephala,
ligustrum ovalifolium,
lilium philadelphicum,
little-head snakeweed,
lonicera periclymenum,
lonicera sempervirens,
low st andrew's cross,
lysimachia terrestris,
macadamia tetraphylla,
madagascar periwinkle,
mahernia verticillata,
maianthemum canadense,
maiden blue-eyed mary,
menispermum canadense,
mentzelia laevicaulis,
menyanthes trifoliata,
mirabilis californica,
monardella lanceolata,
mountain four o'clock,
narrow-leaf penstemon,
nut-leaved screw tree,
onobrychis viciifolia,
orange-blossom orchid,
papaver heterophyllum,
parthenium argentatum,
pellitory-of-the-wall,
peltiphyllum peltatum,
penstemon linarioides,
penstemon whippleanus,
phacelia campanularia,
phalaenopsis amabilis,
phaseolus multiflorus,
piptadenia macrocarpa,
platymiscium pinnatum,
poinciana pulcherrima,
portulaca grandiflora,
prince of wales heath,
psychopsis krameriana,
pulicaria dysenterica,
purple-fringed orchid,
purple-fringed orchis,
purple chinese houses,
purple virgin's bower,
queensland bottletree,
raphanus raphanistrum,
red shrubby penstemon,
rhododendron viscosum,
rice-grain fritillary,
richardson's geranium,
salpichroa rhomboidea,
saponaria officinalis,
saxifraga sarmentosam,
saxifraga stolonifera,
scarlet wisteria tree,
schizopetalon walkeri,
silverleaf nightshade,
sisymbrium officinale,
stinking bean trefoil,
stylophorum diphyllum,
swainsona galegifolia,
swainsona grandiflora,
symplocarpus foetidus,
talinum augustissimum,
tanacetum camphoratum,
telopea speciosissima,
trailing four o'clock,
triostium perfoliatum,
tropaeolum peregrinum,
vaccinium caespitosum,
valeriana officinalis,
vegetable hummingbird,
vincetoxicum hirsutum,
virginian witch hazel,
western prince's pine,
west indian snowberry,
white-leaved rockrose,
white dogtooth violet,
woodland white violet,
wyethia amplexicaulis,
yellow adder's tongue,
yellow mariposa tulip,
zanthoxylum fraxineum
22 letters:
aeschynanthus radicans,
aesculus hippocastanum,
alstroemeria pelegrina,
amphicarpaea bracteata,
andromeda glaucophylla,
anigozanthus manglesii,
asclepias purpurascens,
asclepias verticillata,
aureolaria pedicularia,
australian honeysuckle,
beaumontia grandiflora,
bittersweet nightshade,
brachychiton australis,
brachychiton rupestris,
broad-leaved twayblade,
caesalpinia decapetala,
calamintha grandiflora,
callistephus chinensis,
calophyllum inophyllum,
campanula persicifolia,
campanula rotundifolia,
carolina spring beauty,
centrosema virginianum,
chionanthus virginicus,
clematis verticillaris,
clustered poppy mallow,
collinsia heterophylla,
collinsonia canadensis,
comptonia asplenifolia,
corydalis sempervirens,
crotalaria spectabilis,
cynoglossum officinale,
devil's darning needle,
diervilla sessilifolia,
dipladenia boliviensis,
dwarf flowering almond,
enchanter's nightshade,
erythrina crista-galli,
erythronium americanum,
erythronium dens-canis,
eupatorium coelestinum,
european cranberrybush,
evening trumpet flower,
forestiera neomexicana,
fritillaria imperialis,
fritillaria lanceolata,
fritillaria parviflora,
fritillaria pluriflora,
gelsemium sempervirens,
genus mesembryanthemum,
geranium viscosissimum,
golden-beard penstemon,
habenaria unalascensis,
hamamelid dicot family,
helianthemum canadense,
helichrysum bracteatum,
hemlock water dropwort,
hermannia verticillata,
hibiscus rosa-sinensis,
hooded ladies' tresses,
humming bird's trumpet,
hypericum gentianoides,
hypericum hypericoides,
japanese morning glory,
lagerstroemia speciosa,
lavandula angustifolia,
leiophyllum buxifolium,
leucothoe fontanesiana,
loiseleuria procumbens,
macadamia integrifolia,
mandevilla boliviensis,
mandragora officinarum,
maximilian's sunflower,
micromeria chamissonis,
mirabilis oblongifolia,
moehringia lateriflora,
mucuna pruriens utilis,
nierembergia rivularis,
northern snow bedstraw,
onobrychis viciaefolia,
pachysandra procumbens,
pachysandra terminalis,
pelargonium graveolens,
phacelia tanacetifolia,
physostegia virginiana,
platanthera chlorantha,
platte river penstemon,
polygonatum commutatum,
prenanthes serpentaria,
prince-of-wales'-heath,
pterocarpus angolensis,
pyxidanthera barbulata,
ranunculus glaberrimus,
red-flowered silky oak,
salpichroa organifolia,
sanicula bipinnatifida,
saxifraga occidentalis,
schlumbergera buckleyi,
shrubby st john's wort,
solanum elaeagnifolium,
stephanotis floribunda,
streptosolen jamesonii,
sweet-scented geranium,
thermopsis macrophylla,
thyme-leaved speedwell,
toxicodendron radicans,
tragopogon porrifolius,
verbesina alternifolia,
veronica serpyllifolia,
viccinium membranaceum,
virginia spring beauty,
wild climbing hempweed,
zanthoxylum americanum
23 letters:
acocanthera spectabilis,
ambrosia artemisiifolia,
amelanchier bartramiana,
amsonia tabernaemontana,
anadenanthera colubrina,
arctostaphylos uva-ursi,
arctotis stoechadifolia,
aristolochia clematitis,
blue-eyed african daisy,
broad-leaved bottletree,
broussonetia papyrifera,
buckleya distichophylla,
caesalpinia pulcherrima,
california four o'clock,
california yellow bells,
calochortus macrocarpus,
calyptridium umbellatum,
campanula rapunculoides,
carpenteria californica,
castilleja sessiliflora,
chamaedaphne calyculata,
chrysanthemum balsamita,
chrysanthemum coccineum,
chrysothamnus nauseosus,
coeloglossum bracteatum,
common european dogwood,
common evening primrose,
confederate rose mallow,
conoclinium coelestinum,
creeping st john's wort,
crocanthemum canadensei,
epilobium angustifolium,
erechtites hieracifolia,
european cranberry bush,
family hippocastanaceae,
five-point bishop's cap,
great plains paintbrush,
gymnadenia odoratissima,
helianthus maximilianii,
heteromeles arbutifolia,
hunnemania fumariifolia,
hybrid tuberous begonia,
large-flowered calamint,
leptarrhena pyrolifolia,
lesser butterfly orchid,
lily-of-the-valley tree,
linanthus dianthiflorus,
liriodendron tulipifera,
listera convallarioides,
malaxis ophioglossoides,
melastoma malabathricum,
new zealand honeysuckle,
nierembergia frutescens,
northern jacob's ladder,
ornithogalum thyrsoides,
ornithogalum umbellatum,
phaseolus aconitifolius,
philadelphus coronarius,
platymiscium trinitatis,
playlobium obtusangulum,
polemonium van-bruntiae,
proboscidea louisianica,
pseudobombax ellipticum,
saxifraga oppositifolia,
schlumbergera gaertneri,
schlumbergera truncatus,
snake's head fritillary,
sphaeralcea fasciculata,
stizolobium deeringiana,
subclass caryophyllidae,
vaccinium angustifolium,
verbesina helianthoides,
violet-flowered petunia,
wild lily of the valley,
winter flowering cherry,
zauschneria californica
24 letters:
acocanthera oblongifolia,
actinomeris alternifolia,
alisma plantago-aquatica,
american fly honeysuckle,
anastatica hierochuntica,
anemonella thalictroides,
antirrhinum coulterianum,
arctostaphylos manzanita,
argyranthemum frutescens,
aristolochia macrophylla,
astilbe chinensis pumila,
barbados-gooseberry vine,
brachychiton acerifolius,
brachystegia speciformis,
california pitcher plant,
calycanthus occidentalis,
ceratopetalum gummiferum,
chrysanthemum coronarium,
chrysanthemum frutescens,
clinopodium grandiflorum,
clustered lady's slipper,
combretum erythrophyllum,
cotoneaster horizontalis,
cynoglossum virginaticum,
cypripedium fasciculatum,
darlingtonia californica,
eriodictyon californicum,
erythrina corallodendrum,
erythronium californicum,
erythronium grandiflorum,
eupatorium capillifolium,
european fly honeysuckle,
european ladies' tresses,
false lily of the valley,
gentianella quinquefolia,
geum alleppicum strictum,
great-leaved macrophylla,
greater butterfly orchid,
gutierrezia microcephala,
hugueninia tanacetifolia,
hydrocharis morsus-ranae,
hydrophyllum virginianum,
illecebrum verticullatum,
large-flowering magnolia,
lithophragma parviflorum,
matricaria tchihatchewii,
meconopsis betonicifolia,
mediterranean snapdragon,
narrow-leaved bottletree,
nettle-leaved bellflower,
ozothamnus secundiflorus,
parthenium hysterophorus,
parthenium integrifolium,
platystemon californicus,
pterospermum acerifolium,
purple fringeless orchid,
purple fringeless orchis,
pycnanthemum virginianum,
rocky mountain bee plant,
round-leaved rein orchid,
sagebrush mariposa tulip,
scentless false camomile,
schinus terebinthifolius,
schlumbergera baridgesii,
silver-leaved nightshade,
sisymbrium tanacetifolia,
spiranthes romanzoffiana,
stemless carline thistle,
strongylodon macrobotrys,
stylomecon heterophyllum,
tanacetum ptarmiciflorum,
trigonella foenumgraecum,
umbellularia californica,
vaccinium pennsylvanicum,
veronicastrum virginicum,
white dog's-tooth violet,
yellow bachelor's button
25 letters:
alder-leaved serviceberry,
allegheny mountain spurge,
apocynum androsaemifolium,
argyroxiphium sandwicense,
caryophylloid dicot genus,
celosia argentea cristata,
chrysosplenium americanum,
cycloloma atriplicifolium,
diangus gratianopolitanus,
dracocephalum parviflorum,
duke of argyll's tea tree,
eschscholtzia californica,
haematoxylum campechianum,
hardenbergia comnptoniana,
helichrysum secundiflorum,
iris germanica florentina,
macrodactylus subspinosus,
matricaria matricarioides,
narcissus pseudonarcissus,
pelargonium odoratissimum,
rhododendron californicum,
ruptiliocarpon caracolito,
selenicereus grandiflorus,
tetragonia tetragonioides,
tripleurospermum inodorum,
triplochiton scleroxcylon,
yellow mountain saxifrage,
yellow twining snapdragon
26 letters:
aporocactus flagelliformis,
aspalathus cedcarbergensis,
bruckenthalia spiculifolia,
caryophylloid dicot family,
chrysanthemum leucanthemum,
fringed grass of parnassus,
haplopappus phyllocephalus,
large-leaved cucumber tree,
malacothamnus fasciculatus,
narrow-leaved flame flower,
penstemon centranthifolius,
pink-and-white everlasting,
pithecellodium unguis-cati,
purple-flowering raspberry,
santolina chamaecyparissus,
syringa amurensis japonica,
tabernaemontana divaricate,
trautvetteria carolinensis
27 letters:
alternanthera philoxeroides,
dorotheanthus bellidiformis,
funnel-crest rosebud orchid,
large yellow lady's slipper,
prairie bird's-foot trefoil,
psophocarpus tetragonolobus,
schizophragma hydrangeoides,
trachelospermum jasminoides,
western australia coral pea
28 letters:
broad-leaved everlasting pea,
chrysanthemum ptarmiciflorum,
coptis trifolia groenlandica,
kiss-me-over-the-garden-gate,
oncidium papilio kramerianum,
prairie white-fringed orchis,
solenostemon scutellarioides
29 letters:
aquilegia scopulorum calcarea,
dactylorhiza maculata fuchsii,
hemerocallis lilio-asphodelus,
mesembryanthemum crystallinum,
narrow-leaved everlasting pea,
pyrola rotundifolia americana,
short-spurred fragrant orchid
30 letters:
tripleurospermum tchihatchewii
31 letters:
cypripedium calceolus pubescens
33 letters:
polymonium caeruleum van-bruntiae
34 letters:
amaranthus hybridus erythrostachys
35 letters:
amaranthus hybridus hypochondriacus
Commonly used words are shown in bold. Rare words are dimmed.
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