Flora of Northwest Territories

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

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).

Veronica alaskensis, known as Alaska speedwell or northern kittentails, is a flowering plant in the genus Veronica of the family Plantaginaceae. It was first formally named in 1933 by Francis W. Pennell and was transferred to the genus Veronica in 2004. Veronica alaskensis is native to Alaska and Yukon.

Koenigia alaskana (synonym Aconogonon alaskanum, Persicaria alpina) is an Asian and North American species of flowering plant in the buckwheat family known by the common names Alaska wild-rhubarb and alpine knotweed.

Elymus alaskanus, more commonly known as Alaskan wheatgrass, is an autogamous perennial that is native to North America and part of the family Poaceae. This complex is widespread and has diverged into different taxa based on morphological and cytological studies.

Braya thorild-wulffii, the Greenland northern rockcress, is a plant species native to Greenland, Nunavut the Canadian Northwest Territories, and from the Chukotka Autonomous Okrug of eastern Russia. Braya thorild-wulffii is an herb up to 10 cm tall, sometimes hairy, sometimes not. Leaves are spatula-shaped, up to 4 cm long. Flowers are white to purplish, up to 10 mm in diameter. Fruits spherical or egg-shaped, up to 10 mm in diameter.

Symphyotrichum yukonense (formerly Aster yukonensis) is a species of flowering plant in the family Asteraceae endemic to disjunct areas in Alaska and the Canadian territories of Yukon and Northwest Territories. It has the common name of Yukon aster, and it is a perennial, herbaceous plant 5 to 30 centimeters (2 to 12 inches) in height. Its flowers have purple to blue ray florets and yellow to brown disk florets. S. yukonense grows at elevations of 300–1,500 meters (1,000–4,900 feet) in mud flats and on sandy or silty lake shores. It is a NatureServe Vulnerable (G3) species and is classified

Symphyotrichum pygmaeum (formerly Eurybia pygmaea and Aster pygmaeus) is a species of flowering plant in the family Asteraceae. Commonly known as pygmy aster, it is a perennial, herbaceous plant that may reach heights of 1.5 to 15 centimeters (1⁄2 to 6 inches). Its summer-blooming flowers have purple to violet ray florets and yellow disk florets.

Erigeron porsildii is an Arctic species of flowering plant in the family Asteraceae known by the common name Porsild's Arctic fleabane. It has been found in Alaska, Yukon, and the Northwest Territories. Erigeron porsildii is a perennial herb up to 25 centimeters (10 inches) tall, spreading by means of underground rhizomes. Leaves and stems are covered with many hairs The plant generally produces only one flower head per stem. Each head has 65–110 blue, lavender, or white ray florets surrounding numerous yellow disc florets. The species grows on cliffs, talus, gravel, and dry tundra.

Braya pilosa is a long-lived perennial flowering plant of the mustard family known by the common name hairy braya. It was first found by Sir John Richardson in 1826 during an expedition in search of the Northwest Passage. It wasn't found for 154 years, between 1850 and 2004.

Erigeron yukonensis is a rare Arctic species of flowering plant in the family Asteraceae known by the common name Yukon fleabane. It is native to the northwestern corner of North America: Alaska, Yukon, Northwest Territories. Erigeron yukonensis grows in rocky slopes and meadows, usually above the tree line. It is a branching perennial herb up to 40 centimeters (16 inches) tall, producing a taproot and a woody underground caudex. It generally produces 1-4 flower heads per stem. Each head contains 42–82 pink, purple, or white ray florets surrounding numerous yellow disc florets.

Erigeron denalii is a North American species of flowering plants in the family Asteraceae known by the common name Denali fleabane. It is found in Alaska, Yukon, British Columbia, and Northwest Territories. Erigeron denalii is a very short perennial herb rarely more than 5 cm (2 inches) tall. Each stem generally has only one flower head, with 30–55 white or lavender ray florets surrounding numerous yellow disc florets. The species is named for Denali, the tallest mountain in North America.

Lupinus arcticus is a species of flowering plant in the subfamily Faboideae of the family Fabaceae, known by the common names Arctic lupine or subalpine lupine. It is native to northwestern North America, where it occurs from Oregon north to Alaska and east to Nunavut. It is a common wildflower in British Columbia. This is a perennial herb growing from a taproot and producing erect stems up to 50 centimeters tall. The dark green, hairy leaves are borne upon rough, hairy petioles up to 17 centimeters long. The leaves are palmately compound, made up of 3 to 9 leaflets each measuring up to 6

Cardamine digitata, commonly known as Richardson's bittercress, is an ornamental species of plant in the family Brassicaceae. It is native to Alaska and Canada.

Sisyrinchium septentrionale, the northern blue-eyed grass, is a plant species native to western North America. It has been known from Canada (British Columbia, Alberta, Saskatchewan, and Northwest Territories), and 4 counties in the US State of Washington (Okanagan, Ferry, Stevens and Pend Oreille) and 2 in Montana (Sheridan and Richland). Sisyrinchium septentrionale is a perennial herb up to 50 cm tall. Flowers are pale blue to light violet-blue, with yellow bases.

Festuca edlundiae, commonly known as Edlund's fescue, is a native, perennial, tufted grass of the High Arctic. It occurs in Alaska, the Canadian Arctic Archipelago, northern Greenland, far eastern Arctic Russia, and Svalbard. The specific epithet honours Canadian botanist Sylvia Edlund. The species was first formally described in 1995 by Susan Aiken, Laurie Consaul, and Leonard Lefkovitch.

Arnica lessingii is a Russian and North American species of arnica in the sunflower family. The common name is nodding arnica. It is found on both sides of the Bering Strait, being native to Alaska, Yukon, British Columbia, Northwest Territories, and the Kamchatka Peninsula of the Pacific Coast of Russia.

Cirsium foliosum , also called leafy thistle, foliose thistle, elk thistle, or Evert's thistle, is a North American plant species in the tribe Cardueae within the family Asteraceae. The species is native to Alaska, Yukon, Northwest Territories, Alberta, British Columbia, and Wyoming. Cirsium foliosum is a biennial or perennial herb up to 70 cm (28 inches) tall, blooming only once before dying. Leaves have thin spines along the edges. There are several flowering heads per plant, with white or pale pink disc florets but no ray florets. The roots and stems are edible raw or cooked. The stem,

Antennaria densifolia, the denseleaf pussytoes, is a North American species of plants in the family Asteraceae. It is native to western Canada (Northwest Territories, Yukon, British Columbia, Alberta) and the US states of Alaska and Montana. It grows in subalpine-alpine limestone talus.

Wilhelmsia is a monotypic genus of plants in the family Caryophyllaceae. It contains only one species, Wilhelmsia physodes, native to Alaska, northern Canada (Yukon and Northwest Territories), and Russia. Wilhelmsia physodes is distinctive in the family because of its large, inflated ovary that develops into a round, purple capsule up to 10 mm in diameter, partially septate (divided inside) into 3 compartments, each with 2 teeth on the outside. The plant is a perennial herb spreading by means of underground rhizomes. Stems are generally prostrated except for the upright flowering stalk.

Sabulina elegans, the elegant stichwort or Ross' stitchwort, is a species of flowering plant. It is native to Alaska and northwestern Canada (Alberta, British Columbia, Northwest Territories, and Yukon Territory).

Carex bonanzensis, the Yukon sedge, or the bonanza sedge, is a species of sedge in the family Cyperaceae. It was described by Nathaniel Lord Britton in 1901.

Silene sorensenis, the three-flowered campion or Sorensen's catchfly, is a species of plant in the family Caryophyllaceae. It is found in the tundra of the Canadian Arctic Archipelago, the Northern Russian Far East and Greenland. This species was named after Danish botanist Thorvald Sørensen (1902–1973).

Podistera is a genus of flowering plants in the carrot family. The four species are native to western North America, where they grow in high mountains and northern latitudes. They are compact, mat-forming perennial herbs with a low, clumpy habit common among plants growing in harsh, exposed, cold, dry habitat. Species: Podistera eastwoodiae - Eastwood's podistera (Colorado, Utah, New Mexico) Podistera macounii - Macoun's woodroot (Alaska, Yukon, Northwest Territories) Podistera nevadensis - Sierra podistera (California) Podistera yukonensis - Yukon podistera (Alaska, Yukon)

Salix barrattiana is a species of flowering plant in the willow family known by the common name Barratt's willow. It is native to North America, where it is distributed across Alaska and western Canada, with also a few populations in Montana and Wyoming. These disjunct populations are probably relics from a time when the climate was colder. The southernmost population is technically in Wyoming, but it is located at the Montana state line and it is limited to one clone of all-staminate plants within an area of 100 square meters (1,100 sq ft) in a high-elevation habitat. This willow is a shrub

Mertensia sibirica, commonly known as Japanese bluebells or Siberian bluebells, is a species of flowering plant belonging to the family Boraginaceae. Originally discovered by Carolus Linnaeus, who named it Pulmonaria sibirica, this plant is found, as its name implies, in Eastern Siberia and northern China. After review of the plant's morphology, its taxonomic position was changed to Mertensia sibirica by botanist and plant collector George Don, who put forth the notion of the change, which was eventually accepted, most likely due to the striking resemblance to the related species in the

Salix athabascensis is a species of willow first described by Hugh Miller Raup.

Chrysosplenium iowense is a species of flowering plant in the saxifrage family known by the common name Iowa golden-saxifrage. It is native to North America, where it is "primarily a Canadian species", occurring from the northern Northwest Territories south to British Columbia and east to Manitoba. There are also disjunct, relictual occurrences within the United States, in the Driftless Area of Minnesota and Iowa.

Cerastium arcticum, the Arctic mouse-ear chickweed or Arctic mouse-ear, is a flower found in parts of western and southern Greenland, Baffin Island, Labrador, Iceland, Faroe Islands, Scotland, Norway and Svalbard. It is a perennial herb that grows in tufts, sometimes loosely, generally in damp places and on open gravel. Most of the plant is pubescent, the hairs appearing stiff. Leaves are elliptical. The flowers are white, rather large, beautiful when fully expanded, single or two together. Petals are deeply notched and considerably longer than sepals.

Castilleja elegans, the elegant Indian paintbrush, is a herbaceous plant species in the genus Castilleja found in Canada.