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| Crepis occidentalis ssp. costata (Gray) Babcock & Stebbings | Species Image Gallery (opens in a new window) |
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| TAXONOMY | |||||||||||||||||||||||||||||||||
| Family: | Asteraceae or Compositae | ||||||||||||||||||||||||||||||||
| Genus: | Crepis | ||||||||||||||||||||||||||||||||
| Species Synonyms: | Crepis occidentalis var. costata
Gary Psilochenia occidentalis ssp. costata (Gray) W.A. Weber |
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| Common Names: | western hawksbeard largeflower hawksbeard |
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| DISTRIBUTION | |||||||||||||||||||||||||||||||||
| Canada: | southern British Columbia – southwestern Saskatchewan | ||||||||||||||||||||||||||||||||
| Saskatchewan: | southwestern Saskatchewan; Cypress Hills, Frenchman River, Saskatchewan River | ||||||||||||||||||||||||||||||||
| Ecoregion: | Cypress Uplands, Mixed Grassland | ||||||||||||||||||||||||||||||||
| HABITAT | |||||||||||||||||||||||||||||||||
| Saskatchewan: | coarse-textured or gravelly soils on sparsely to well-vegetated slopes | ||||||||||||||||||||||||||||||||
| Associated species: | desert wirelettuce, gaillardia, goldenpea, narrowleaf milkvetch, plains muhly | ||||||||||||||||||||||||||||||||
| RARITY STATUS | |||||||||||||||||||||||||||||||||
| Provincial
Status According to Harms (2003): |
Threatened |
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| Nature Conservancy Status: | G5 N2 S2 |
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| Saskatchewan
Species at Risk Status: |
None |
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| COSEWIC Status: | None |
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| Western hawksbeard is threatened because of rarity in Saskatchewan. It is somewhat regionally restricted within the province and almost always locally sparse. The most imminent threat to this species is habitat loss. | |||||||||||||||||||||||||||||||||
| SPECIES DESCRIPTION | |||||||||||||||||||||||||||||||||
| Height: | 20 – 40 cm tall | ||||||||||||||||||||||||||||||||
| Roots: | taproot | ||||||||||||||||||||||||||||||||
| Stems: | 1 – 3 from persistent woody base, branched near top, gray-woolly, glandular upwards | ||||||||||||||||||||||||||||||||
| Leaves: | basal and on the stem; basal leaves several in a rosette, stalk winged, leaves 10 – 30 cm long, toothed with teeth pointing downward to lobed, grey-woolly; stem leaves few, sessile, without ear-like lobes, reduced upwards, uppermost bract-like, toothed to lobed to linear, gray-woolly, glandular-hairy upwards | ||||||||||||||||||||||||||||||||
| Inflorescence: | heads 2 – 20 in clusters, to 1.5 cm long, 0.5 – 1 cm broad, 12 – 20 flowered; ray flowers only; bracts in 2 series, the outer less than half as long as the inner, straw-coloured with dark brown midvein, hairs gland-tipped; receptacle naked | ||||||||||||||||||||||||||||||||
| Flowers: | ray flowers to 2 cm long, yellow, perfect; pappus white, capillary bristles | ||||||||||||||||||||||||||||||||
| Fruits: | achene 6 – 10 mm long, spindle shaped, 10 – 20-ribbed, beakless, brownish | ||||||||||||||||||||||||||||||||
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