Biology:Crepis occidentalis
| Crepis occidentalis | |
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Crepis |
| Species: | C. occidentalis
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| Binomial name | |
| Crepis occidentalis | |
| Synonyms[1] | |
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Crepis occidentalis is a North American species of flowering plant in the family Asteraceae known by the common names western hawksbeard,[2]:119 or largeflower hawksbeard. It is native to western Canada (British Columbia, Alberta, Saskatchewan) and the western United States (from the Pacific to the western Great Plains).
Crepis occidentalis grows in many types of habitat. It is a perennial herb growing a grayish woolly branching stem to about 40 centimeters (16 inches) in height from a deep taproot. The woolly, toothed leaves are up to 30 centimeters (12 inches) long at the base of the plant. The inflorescence produces several clusters of flower heads with hairy, often glandular phyllaries and many yellow ray florets but no disc florets. The fruit is a ribbed achene with a frilly pappus at the tip.[3]
- Crepis occidentalis subsp. conjuncta Babcock & Stebbins – California , Colorado, Montana, Oregon, Washington (state) , Wyoming
- Crepis occidentalis subsp. costata (A.Gray) Babc. & Stebbins – British Columbia, Saskatchewan, California , Colorado, Idaho, Montana, Nevada, Oregon, Utah, Washington (state) , Wyoming
- Crepis occidentalis subsp. occidentalis – Alberta, British Columbia, Saskatchewan, Arizona, California , Colorado, Idaho, Montana, Oregon, New Mexico, Nevada, South Dakota, Utah, Washington (state) ., Wyoming
- Crepis occidentalis subsp. pumila (Rydb.) Babc. & Stebbins – British Columbia; California , Idaho, Montana, Nevada, Oregon, Utah, Washington (state)
Cultivation
Western hawksbeard is occasionally grown by wildflower gardeners for its large deep yellow blooms. The taproot cannot be divided for successful propagation and therefore it is planted from seed when cultivated. The author Claude A. Barr was of the opinion that this species is the most attractive in the genus Crepis and that all the others are, "for the birds."[4]
References
- ↑ 1.0 1.1 The Plant List, Crepis occidentalis Nutt.
- ↑ Great Basin Wildflowers, Laird R. Blackwell, 2006, Morris Book Publishing LLC., ISBN:0-7627-3805-7
- ↑ 3.0 3.1 Flora of North America, Gray or western hawksbeard, Crepis occidentalis Nuttall, J. Acad. Nat. Sci. Philadelphia. 7: 29. 1834.
- ↑ Barr, Claude A. (1983). Jewels of the plains : wild flowers of the Great Plains grasslands and hills. Minneapolis: University of Minnesota Press. p. 63. ISBN 0-8166-1127-0.
External links
- Calflora Database: Crepis occidentalis (Largeflower hawksbeard)
- Jepson Manual eFlora (TJM2) treatment of Crepis occidentalis
- USDA Plants Profile for Crepis occidentalis (largeflower hawksbeard)
- UC Calphotos gallery of Crepis occidentalis
Wikidata ☰ Q5184283 entry
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