Chaenactis douglasii
| Chaenactis douglasii | |
|---|---|
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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: | Chaenactis |
| Species: | C. douglasii
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| Binomial name | |
| Chaenactis douglasii | |
| Synonyms[1] | |
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Synonymy
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Chaenactis douglasii is a North American species of flowering plant in the daisy family known by the common name Douglas' dustymaiden.
Description
[edit]Chaenactis douglasii is a variable herb, generally a perennial. It grows erect to 10–60 centimetres (4–24 inches), with one to many stems coated in cobwebby hairs. The woolly or hairy leaves may be up to 15 cm (6 in) long and are divided intricately into many lobes with curled or twisted tips. Stem leaves become smaller and stalkless upwards.[2][3][4][5]
The inflorescence produces one or more flower heads, each up to about 2 cm (3⁄4 in) long. The discoid flower head is lined with flat, glandular, blunt-pointed phyllaries and contains 50–70 white or pinkish tubular disc flowers with protruding anthers.[2][6][3]
The fruit is an achene about 1 cm (3⁄8 in) long including its pappus of scales.[2]
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A flower head
- Varieties
- Chaenactis douglasii var. alpina A.Gray
- Chaenactis douglasii var. douglasii
Distribution and habitat
[edit]The plant is found in western Canada and the western United States from British Columbia to Saskatchewan, and south to California to New Mexico, with a few isolated populations in Nebraska and the Dakotas.[7] It grows in a wide variety of habitats, including harsh environments such as rock fields in alpine climates in the Sierra Nevada, east of the crest of the Cascade Range of Washington and Oregon, scrubland and desert, and disturbed areas such as roadsides. Distributed over a wide range of elevations, from sea level to 4,000 metres (13,000 feet), it is found most often between 1,800–2,400 m (6,000–8,000 ft).[8][9][10]
Uses
[edit]Some Plateau Indian tribes used this plant as a dressing for burns, wounds, and sores.[11]
References
[edit]- ^ The Plant List, Chaenactis douglasii (Hook.) Hook. & Arn.
- ^ a b c Flora of North America, Hoary pincushion, Douglas’s dustymaiden, Chaenactis douglasii (Hooker) Hooker & Arnott, Bot. Beechey Voy. 354. 1839.
- ^ a b Klinkenberg, Brian, ed. (2020). "Chaenactis douglasii". E-Flora BC: Electronic Atlas of the Plants of British Columbia [eflora.bc.ca]. Lab for Advanced Spatial Analysis, Department of Geography, University of British Columbia, Vancouver. Retrieved 2020-09-22.
- ^ Giblin, David, ed. (2020). "Chaenactis douglasii". WTU Herbarium Image Collection. Burke Museum, University of Washington. Retrieved 2020-09-22.
- ^ "Chaenactis douglasii". in Jepson Flora Project (eds.) Jepson eFlora. Jepson Herbarium; University of California, Berkeley. 2020. Retrieved 2020-09-22.
- ^ Taylor, Ronald J. (1994) [1992]. Sagebrush Country: A Wildflower Sanctuary (rev. ed.). Missoula, MT: Mountain Press Pub. Co. p. 160. ISBN 0-87842-280-3. OCLC 25708726.
- ^ Biota of North America Program 2014 county distribution map
- ^ Calflora taxon report, University of California, Chaenactis douglasii (Hook.) Hook. & Arn., Chaenactis, Douglas' dustymaiden, hoary chaenactis
- ^ Sullivan, Steven. K. (2020). "Chaenactis douglasii". Wildflower Search. Retrieved 2020-09-22.
- ^ USDA, NRCS. (2020). "Chaenactis douglasii". The PLANTS Database. National Plant Data Team, Greensboro, NC 27401-4901 USA. Retrieved 2020-09-22.
- ^ Hunn, Eugene S. (1990). Nch'i-Wana, "The Big River": Mid-Columbia Indians and Their Land. University of Washington Press. p. 352. ISBN 0-295-97119-3.
