Flora of Subarctic America

Arctous alpina (syn. Arctostaphylos alpina), the alpine bearberry, mountain bearberry or black bearberry, is a dwarf shrub in the heather family Ericaceae. The basionym of this species is Arbutus alpina L..

Boechera holboellii, or Holbøll's rockcress, is a species of plant in the family Brassicaceae. Its cytology has been much studied by the Danish botanist Tyge W. Böcher. Circumscription of this species has varied, with earlier works treating it as a widespread, polymorphic species with several varieties, while more recently it has been treated as a much more narrowly defined species from Greenland. The rust fungus Puccinia monoica infects the plant leading to pseudoflowers, which mimic those of yellow, early spring wildflowers (e.g. buttercups), not only in visible light but also in

Saxifraga platysepala is a species of flowering plant belonging to the family Saxifragaceae. Its native range is Subarctic.

Carex boecheriana is a species of sedge in the family Cyperaceae, native to Greenland. It is a host of the smut fungi Anthracoidea capillaris.

Artemisia aleutica, the Aleutian wormwood, is a rare species of flowering plant endemic to Alaska. According to NatureServe, the species is Critically Imperiled and is known in only two locations in the Rat Island group.

Stellaria longipes is a species of flowering plant in the family Caryophyllaceae known by the common names longstalk starwort and Goldie's starwort. It has a circumpolar distribution, occurring throughout the northernmost latitudes of the Northern Hemisphere. It is a perennial herb that grows in a wide variety of habitat types, including tundra and taiga and many areas further south with subalpine and alpine climates. It is extremely variable in morphology, its form depending on both genetic makeup and environmental conditions. It has a widely varying number of chromosomes. In general, it is

Parrya nauruaq is a species of flowering plant in the family Brassicaceae that is native to southern Alaska. A subshrub, it grows on gravelly plains and slopes that support little other vegetation.

Cerastium aleuticum, common name Aleutian mouse-ear chickweed, is a plant species endemic to the US State of Alaska. It is found only on islands, not on the Alaskan mainland: Aleutian, St. Lawrence, St. Paul, Popof, and Kodiak Islands. It is found on rocky slopes and mountainsides up to an elevation of 700 m (2,300 ft). Cerastium aleuticum is a perennial herb spreading by means of underground rhizomes. Stems are branched, up to 7 cm (2.8 in) long, covered with soft hairs. Flowers are single or in groups of 2 or 3, white. Capsules are cylindrical, up to 11 mm long.

Sisyrinchium groenlandicum, commonly known as Greenland blue-eyed grass, is a perennial cespitose herb native and endemic to Greenland. It has simple purplish tinged 1–2 mm wide stems and glabrous grass-like leaves and 10–13 mm wide pale blue flowers. It is only known from the areas of Nuup Kangerlua, Ameralik and previously Kangerslussuaq.

Artemisia senjavinensis, the arctic wormwood, is a rare Arctic species of plants in the family Asteraceae. It has been found only on the Seward Peninsula on the Alaskan side of the Bering Strait and on the Chukotka (Chukchi) Peninsula on the Russian side. Artemisia senjavinensis is a shrub up to 90 cm (3 feet) tall, with many stems densely clumped together. Leaves are gray-green, woolly, mostly in rosettes close to the ground. There are many small yellow or tan flower heads. The species grows at low elevations near the shore.

Saxifraga nathorstii, or Nathorst's saxifrage, is a species of flowering plant belonging to the family Saxifragaceae. Saxifraga nathorstii is a putative allotetraploid hydrid between S. aizoides and S. oppositifolia, and morphologically intermediate, even in terms of pollen, between the parent species. It is native and endemic to Greenland, with a limited distribution in Northeast Greenland.

Erigeron alpiniformis is a rare Arctic species of flowering plants in the family Asteraceae, and one of several plants known by the common name alpine fleabane. It has been found only in Greenland (Kalaallit Nunaat, part of Denmark) and in Labrador and Nunavut in Canada. Erigeron alpiniformis is a short, branching shrub rarely more than 20 cm (8 inches) tall. The inflorescence generally consists of 1 or 2, rarely 3 or 4 flower heads, each head with many small yellow disc florets and surrounded by a ring of 100–200 white or pinkish-purple ray florets.

Claytonia scammaniana is a biogeographically significant species of Claytonia, which is indigenous to the mountain chains of Alaska and Yukon. The species has been subject of differing taxonomic opinions and confusion with Claytonia arctica and C. sarmentosa. A taxonomic revision including a review of previous studies of Claytonia scammaniana was published in 2006.

Draba kluanei, also known as Kluane draba, is a species of plant in the Draba genus. It is endemic to the Kluane National Park in the Yukon, Canada. It is listed as possibly extinct by NatureServe.

Symphyotrichum nahanniense (formerly Aster nahanniensis) is a species of flowering plant in the family Asteraceae endemic to Northwest Territories, Canada.

Draba yukonensis, also known as the Yukon draba or the Yukon whitlow-grass, is a species of plant of the Draba genus. It is endemic to the Yukon, Canada. It is listed as imperiled by NatureServe.

Claytonia ogilviensis, common name Ogilvie Mountains spring beauty, is a plant endemic to the Ogilvie Mountains and the Dawson Range in the Yukon Territory of Canada. These mountains extend into Alaska, and one of the known populations is less than 1 km from the border, so it would not be surprising if the plant were to be found in Alaska as well. Claytonia ogilviensis is a perennial herb with round or turnip-shaped tubers up to 25 mm in diameter, spreading by means of underground rhizomes. Stems are up to 8 cm tall. Leaves are generally round, up to 2.5 cm in diameter. Flowers are borne in

Nestotus macleanii, also known as the Yukon goldenweed, is a species of plant in the genus Nestotus. It is endemic to the Yukon, Canada. According to NatureServe, it is vulnerable but not currently at risk.

Draba caswellii, also known as Caswell's draba, is a species of plant of the Draba genus. It is endemic to the Kluane National Park in the alpine tundra on the Yukon, Canada. It is listed as critically imperiled by NatureServe. Most closely resembles D. porsildii, it differs by having soft, crisped trichomes throughout.

Diphasiastrum alpinum, the alpine clubmoss, is a species of clubmoss. This plant is a glaucous scale-leaved perennial pteridophyte. In Finland, the spores are produced June to September. It was first described by Carl Linnaeus in his Flora Lapponica, 1737, from specimens obtained in Finland.

Picea × lutzii is a hybrid spruce tree that is a natural cross between white spruce and Sitka spruce occurring where the ranges of the two species overlap in coastal south-central Alaska and coastal British Columbia. Its common name is Lutz spruce. Its morphology is intermediate between the two parent species, the maritime Sitka spruce and the white spruce of dryer climates further inland. In addition to the parent spruces it shares its ecosystem with Tsuga heterophylla and T. mertensiana. The tree was named for Harold John Lutz, a scientist who specialized in forest soils and worked briefly

Carex arctiformis, the polar sedge, is a species of sedge native to sphagnum bogs and other wetlands in northwestern North America (British Columbia and southeastern Alaska). It was first formally named by Kenneth Mackenzie in 1931.

Potentilla pulchella is a species of flowering plant belonging to the family Rosaceae. It is native to Subarctic to Central and Eastern Canada.

Lupinus kuschei, the Yukon lupine, is a species of flowering plant from the order Fabales which can be found in Alaska and Western Canada.

Boykinia richardsonii is a species of flowering plant in the family Saxifragaceae, endemic to Alaska and the adjacent Canadian territory of Yukon. It is commonly known as Richardson's brookfoam, but has also been called Alaska boykin, bearflower, Richardson's boykin and Richardson's saxifrage. "Bearflower" reflects its popularity with grizzly bears as forage in the summer months when it flowers. The species is named for Scottish naturalist John Richardson, who first identified it on his mid-1820s exploration of the western Canadian Arctic coast with John Franklin. William Jackson Hooker first

Artemisia globularia, the purple wormwood, is a rare Asian and North American species of plants in the family Asteraceae. It is native to Alaska, Yukon Territory, and the Chukotka Autonomous Okrug of Russia.

× Pucciphippsia is a nothogenus of Arctic plants in the grass family, reported from Greenland, Svalbard, and Magadan. The nothogenus is derived from a hybridization between Phippsia and Puccinellia. Species × Pucciphippsia czukczorum Tzvelev - Magadan Oblast (part of the Russian Federation) × Pucciphippsia vacillans (Th.Fr.) Tzvelev - Greenland (part of Denmark), Svalbard (part of Norway)

Erigeron purpuratus is a North American species of flowering plant in the family Asteraceae known by the common name purple fleabane. The species grows in Alaska (part of the United States) and Yukon (part of Canada). Erigeron purpuratus is a perennial herb up to 14 centimeters (5.6 inches) tall, producing a large branching caudex that serves to spread the plant into clonal clumps. The plant generally produces only 1 flower head per stem, the bracts forming the sides of the head appearing purple. Each head has 40–90 purple, pink or white ray florets surrounding numerous yellow disc florets.

Arcteranthis is a genus of flowering plants belonging to the family Ranunculaceae. It contains a single species, Arcteranthis cooleyae. Its native range is Washington, British Columbia and Alaska.

Androsace americana, synonym Douglasia arctica, known as the Mackenzie River dwarf primrose, is a species of flowering plant in the primrose family, Primulaceae. It is native to subarctic North America (Alaska, the Northwest Territories and Yukon).