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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.

The flower head is discoid with 50 to 70 white or pinkish disk flowers.[2]
The flower head is discoid with 50 to 70 white or pinkish disk flowers.[2]

Chaenactis douglasii
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Chaenactis
Species:
C. douglasii
Binomial name
Chaenactis douglasii
(Hook.) Hook. & Arn.
Synonyms[1]
Synonymy
  • Chaenactis achilleifolia Hook. & Arn.
  • Chaenactis angustifolia Greene
  • Chaenactis brachiata Greene
  • Chaenactis cheilanthoides Greene
  • Chaenactis cinerea Stockw.
  • Chaenactis humilis Rydb.
  • Chaenactis imbricata Greene
  • Chaenactis pedicularia Greene
  • Chaenactis pumila Greene
  • Chaenactis ramosa Stockw.
  • Chaenactis rubricaulis Rydb.
  • Chaenactis suksdorfii Stockw.
  • Hymenopappus douglasii Hook.
  • Macrocarphus achilleifolius (Hook. & Arn.) Nutt.
  • Macrocarphus douglasii (Hook.) Nutt.

Description


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.[3][2][4][5]

The inflorescence produces one or more flower heads, each up to about 2 cm (3⁄4 in) long. The flower head is lined with flat, glandular, blunt-pointed phyllaries and contains several white or pinkish tubular disc flowers with protruding anthers.[3][6]

The fruit is an achene about 1 cm (3⁄8 in) long including its pappus of scales.[3]

Varieties

Distribution


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


Some Plateau Indian tribes used this plant as a dressing for burns, wounds, and sores.[11]


References


  1. The Plant List, Chaenactis douglasii (Hook.) Hook. & Arn.
  2. 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.
  3. Flora of North America, Hoary pincushion, Douglas’s dustymaiden, Chaenactis douglasii (Hooker) Hooker & Arnott, Bot. Beechey Voy. 354. 1839.
  4. Giblin, David, ed. (2020). "Chaenactis douglasii". WTU Herbarium Image Collection. Burke Museum, University of Washington. Retrieved 2020-09-22.
  5. "Chaenactis douglasii". in Jepson Flora Project (eds.) Jepson eFlora. Jepson Herbarium; University of California, Berkeley. 2020. Retrieved 2020-09-22.
  6. 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.
  7. Biota of North America Program 2014 county distribution map
  8. Calflora taxon report, University of California, Chaenactis douglasii (Hook.) Hook. & Arn., Chaenactis, Douglas' dustymaiden, hoary chaenactis
  9. Sullivan, Steven. K. (2020). "Chaenactis douglasii". Wildflower Search. Retrieved 2020-09-22.
  10. USDA, NRCS. (2020). "Chaenactis douglasii". The PLANTS Database. National Plant Data Team, Greensboro, NC 27401-4901 USA. Retrieved 2020-09-22.
  11. 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.




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