Flora of Western Canada

Potentilla diversifolia or Potentilla × diversifolia is a species of flowering plant in the Rose Family (Rosaceae) known by the common names varileaf cinquefoil, different-leaved cinquefoil, and mountain meadow cinquefoil.

Crataegus purpurella, also known as the Loch Lomond hawthorn, is a plant in the Crataegus genus. It is endemic to Saskatchewan, Canada, and is unranked by NatureServe.

Limnanthes macounii, or Macoun's meadowfoam, is an endangered meadowfoam. It is a narrow endemic of south-western British Columbia, Canada. It was discovered in 1875 in the vicinity of the city of Victoria. Once thought to be extinct, it was rediscovered in 1957 on Trial Island, BC and is now known from several scattered localities in southern British Columbia. It is a winter annual growing in seasonally wet areas.

Castilleja victoriae is a species of flowering plant in the broomrape family known by the common names Victoria's owl-clover and Victoria's paintbrush.

Salix turnorii, also known as Turnor's willow, is a species of willow. It is endemic to the Athabasca Sand Dunes Provincial Park in Saskatchewan, Canada. It is listed as imperiled by NatureServe.

Lewisiopsis tweedyi is a flowering plant and sole species in genus Lewisiopsis. The species, formerly known as Cistanthe tweedyi and Lewisia tweedyi, is now classified in the family Montiaceae. The plant is known by the common names Tweedy's pussypaws, Tweedy's lewisia, or Tweedy's bitterroot. It is endemic to western North America in north-central Washington and adjacent British Columbia. It commonly grows on well-drained slopes often on rocky slopes or in rock crevices from low elevation ponderosa pine sites up to the drier part of the Grand Fir zone of the North Cascades. The flowers

Hesperostellaria is a genus of flowering plants in the family Caryophyllaceae. It contains a single species, Hesperostellaria americana, a perennial native to subalpine areas of Alberta and Montana. The species was first described as Stellaria dichotoma var. americana in 1894, and later renamed Stellaria americana. In 2023 it was placed in the new monotypic genus Hesperostellaria as Hesperostellaria americana.

Trillium hibbersonii is a species of flowering plant in the bunchflower family Melanthiaceae. The specific epithet hibbersonii honors the English Canadian surveyor John Arthur Hibberson (1881–1955) who first collected this plant in 1938 on Vancouver Island in British Columbia. Hibberson and his son propagated the trilliums, selling them to buyers in England and other European countries. In 1968, Leonard Wiley coined the Latin name Trillium hibbersonii, a name that has since been used by horticulturists without reservation. When botanists finally became aware of Hibberson's trillium in 1974,

Hesperostellaria is a genus of flowering plants in the family Caryophyllaceae. It contains a single species, Hesperostellaria americana, a perennial native to subalpine areas of Alberta and Montana. The species was first described as Stellaria dichotoma var. americana in 1894, and later renamed Stellaria americana. In 2023 it was placed in the new monotypic genus Hesperostellaria as Hesperostellaria americana.

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

Euonymus occidentalis is a species of spindle tree known by the common names western burning bush and western wahoo.

Lupinus sulphureus (sulphur lupine, sulphur-flower lupine) is a species of lupine, a flowering plant of the legume family, Fabaceae.

Limnanthes, the type genus of the family Limnanthaceae, consists of annual herbaceous plants commonly known as the meadowfoams. The seven species are all native to coastal and adjoining regions (inland valleys, foothills and mountains) of western North America, where they typically grow in marshy habitats, such as the margins of vernal pools. Some are endemic to California. General form ranges from decumbent to erect, with leaves either pinnately lobed or compound; the lobes or leaflets may themselves range from entire to deeply lobed. Both 4- and 5-sepaled and petaled members are known. The

Lupinus lepidus, the Pacific lupine, prairie lupine or dwarf lupine is a perennial herbaceous plant in the pea family (Fabaceae) native to western North America.

Lewisiopsis tweedyi is a flowering plant and sole species in genus Lewisiopsis. The species, formerly known as Cistanthe tweedyi and Lewisia tweedyi, is now classified in the family Montiaceae. The plant is known by the common names Tweedy's pussypaws, Tweedy's lewisia, or Tweedy's bitterroot. It is endemic to western North America in north-central Washington and adjacent British Columbia. It commonly grows on well-drained slopes often on rocky slopes or in rock crevices from low elevation ponderosa pine sites up to the drier part of the Grand Fir zone of the North Cascades. The flowers

Crataegus okanaganensis is a species of hawthorn native to western British Columbia, Washington state and Montana. It forms a vigorous shrub to 8 m in height with brilliant red fruit in late summer, that later ripen to "burgundy to deep purple (occasionally almost black)". It has potential as an ornamental plant.

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.

Triphysaria versicolor is a species of flowering plant in the family Orobanchaceae known by the common name yellowbeak owl's-clover. It is native to the west coast of North America from British Columbia to central California, where it grows in grassland habitat.

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

Lomatium brandegeei, also known as Brandegee's desert-parsley is a perennial herb of the family Apiaceae that is found in the mountains of Washington and southern British Columbia.

Hackelia diffusa is a species of flowering plant in the family Boraginaceae known by the common name spreading stickseed.

Delphinium menziesii, the Puget Sound larkspur, northern dwarf larkspur, or Menzies' larkspur, is a species of flowering plant in the family Ranunculaceae. It is native to British Columbia, Washington, and Oregon. A perennial reaching 75 cm (30 in), it is hummingbird pollinated.

Castilleja elmeri is a species of flowering plant in the family Orobanchaceae with the common name Elmer's paintbrush. As with most Castilleja species, this is a facultative root hemiparasite and will usually be seen growing close to a host plant.

Calochortus lyallii, or Lyall's mariposa lily, is a North American species of flowering plant in the lily family. It is native and endemic to Province of British Columbia in western Canada, as well as the State of Washington in the northwestern United States. It only grows east of the Cascade crest in the mountains and foothills, and though its numbers are apparently secure in Washington, it is considered to be a blue-listed species in Canada- blue-listed taxa are at risk, but are not extirpated, endangered or threatened. It is found in dry to mesic open forest at lower to middle elevations

Androsace laevigata, synonym Douglasia laevigata, known as the cliff dwarf primrose, is a species of flowering plant in the primrose family, Primulaceae. It is native to the central Pacific coastal mountains of North America (west of the crest of the Cascade Range of British Columbia, Oregon and Washington) below 2,400 metres (8,000 ft) elevation. Its habitat includes cliffs, rocks, and alpine.

Penstemon richardsonii is a species of flowering plant in the plantain family; its common name is cutleaf beardtongue or Richardson's beardtongue. It is native to the US states of Washington, Oregon and the Canadian province British Columbia.

Penstemon pruinosus is a species of flowering plant in the plantain family; its common name is the Chelan penstemon. It is native to Washington State and southern British Columbia on the east side of the Cascade Mountains.

Erigeron trifidus is a Canadian species of flowering plant in the family Asteraceae known by the common name Alberta fleabane. It is native to the provinces of Alberta and British Columbia in western Canada. Erigeron trifidus grows on talus and scree slopes in alpine zones at high elevations. It is a small perennial herb rarely more than 10 centimeters (4 inches) tall, producing a branching underground caudex. Leaves are usually 3-lobed, up to 3 cm (1.2 inches) long. The inflorescence is made up of only one flower heads per stem. Each head contains 20–40 white, lavender, or pink ray florets

Erigeron pallens is a species of flowering plant in the family Asteraceae known by the common name pale fleabane. It is native to the Rocky Mountains of western Canada (Alberta + British Columbia). There are some reports of the species in arctic regions but these populations have been reclassified under other species. Erigeron pallens is a tiny, unbranching perennial herb rarely more than 10 centimeters (4 inches) tall, producing a woody taproot. The leaves are covered with wool. The plant generally produces only 1 flower head per stem, each head with 50–60 white, pink, or purple ray florets

Elmera racemosa is a species of flowering plant belonging to the family Saxifragaceae. It is the sole species in genus Elmera. Its native range is from British Columbia in south-western Canada to Washington and Oregon in the northwestern United States. The genus is named in honour of Adolph Daniel Edward Elmer (1870–1942), an American botanist and plant collector, it was first published and described in N.L.Britton & al. (eds.), N. Amer. Fl. Vol.22 on page 97 in 1905. The specific epithet of racemosa is derived from 'racemus' meaning cluster. The species has 2 known synonyms; Elmera racemosa