Chaenactis douglasii explained

Chaenactis douglasii is a North American species of flowering plant in the daisy family known by the common name Douglas' dustymaiden.

Description

Chaenactis douglasii is a variable herb, generally a perennial. It grows erect to 10-, with one to many stems coated in cobwebby hairs. The woolly or hairy leaves may be up to 15cm (06inches) long and are divided intricately into many lobes with curled or twisted tips. Stem leaves become smaller and stalkless upwards.^{[1] [2] [3] [4]}

The inflorescence produces one or more flower heads, each up to about 2abbr=on1abbr=on 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.^[5]

The fruit is an achene about 1abbr=on1abbr=on long including its pappus of scales.

Varieties

• Chaenactis douglasii var. alpina A.Gray
• Chaenactis douglasii var. douglasii

Distribution and habitat

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.^[6] 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 13000feet, it is found most often between 6000-.^{[7] [8] [9]}

Uses

Some Plateau Indian tribes used this plant as a dressing for burns, wounds, and sores.^[10]

External links

• • Jepson Manual Treatment of Chaenactis douglasii
• United States Department of Agriculture Plants Profile for Chaenactis douglasii
• Chaenactis douglasii — Calphotos Photo gallery, University of California

Notes and References

1. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250066309 Flora of North America, Hoary pincushion, Douglas’s dustymaiden, Chaenactis douglasii (Hooker) Hooker & Arnott, Bot. Beechey Voy. 354. 1839.
2. Web site: Chaenactis douglasii . Klinkenberg . Brian . 2020 . 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 . 2020-09-22.
3. Web site: Chaenactis douglasii . Giblin . David . 2020 . WTU Herbarium Image Collection . Burke Museum, University of Washington . 2020-09-22.
4. Web site: Chaenactis douglasii . 2020 . in Jepson Flora Project (eds.) Jepson eFlora . Jepson Herbarium; University of California, Berkeley . 2020-09-22.
5. Book: Taylor, Ronald J.. Sagebrush Country: A Wildflower Sanctuary. Mountain Press Pub. Co. 1994. 0-87842-280-3. rev.. Missoula, MT. 160. en. 25708726. 1992.
6. http://bonap.net/MapGallery/County/Chaenactis%20douglasii.png Biota of North America Program 2014 county distribution map
7. http://www.calflora.org/cgi-bin/species_query.cgi?where-calrecnum=1894 Calflora taxon report, University of California, Chaenactis douglasii (Hook.) Hook. & Arn., Chaenactis, Douglas' dustymaiden, hoary chaenactis
8. Web site: Sullivan . Steven. K. . 2020 . Chaenactis douglasii . Wildflower Search . 2020-09-22.
9. Web site: USDA, NRCS. . 2020 . Chaenactis douglasii . The PLANTS Database . National Plant Data Team, Greensboro, NC 27401-4901 USA. . 2020-09-22.
10. Book: Hunn, Eugene S. . Nch'i-Wana, "The Big River": Mid-Columbia Indians and Their Land . . 1990 . 0-295-97119-3. 352.