arctic archipelago, polar, arctic, subpolar, antarctic, little diomede, boreal, arctic circle, cenozoic era, arctic ocean, subalpine, subantarctic, glacial, weddell sea, circumpolar, glacier, altitudinal, syrtis major, bellingshausen sea, subglacial, quaternary period, ivory gull, amundsen sea, wrangel island, ellesmere island, lake ladoga, montane, frobisher bay, lungless salamander, northernmost, wrangell mountains, archaean, laptev sea, musk ox, bering sea, pleistocene epoch, selkirk mountains, oligotrophic, subaqueous, phanerozoic, spruce grouse, vitus bering, novaya zemlya, adelie penguin, driftless, icebound, semidesert, athabaskan, golden plover, antarctic peninsula, intertidal, biogeographic, relict, antarctic continent, ursus maritimus, glaciated, frigid, baranof island, tufted duck, mendenhall glacier, balmiest, baffin island, whooper swan, temperate, inuit, harlequin duck, arctic hare, physiographic, tadpole shrimp, lichen, planktonic, middle paleolithic, lappish, holocene epoch, tuamotu archipelago, mesolithic, tundra swan, sequoia sempervirens, comb jelly, equatorial, anticyclonic, seward peninsula, common scoter, altai mountains, cloudberry, ross ice shelf, andreanof islands, tertiary period, mammuthus, kola peninsula, nonmigratory, chichagof island, geodynamic, taimyr peninsula, marquesas islands, ozark plateau, snowless, limber pine, hydrologic cycle, cragged, spadefoot toad, balsam poplar, barrens, canada, cordillera, craton, farmlands, goldfields, greenland, headwaters, hinterland, hinterlands, labrador, newfoundland, parklands, plains, prov, provinces, seaway, songbirds, taiga, westward, subtropical, intertropical, steppe, riverine, tropical, amazonian, rainforest, semiarid, littoral, coastal, mediterranean

algonquian, algonquin, arctic poppy, athabascan, athabaskan, athapascan, athapaskan, eelblenny, iceland poppy, papaver nudicaule, ptarmigan, smooth woodsia, tundra soil, woodsia glabella