Phacelia sericea

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Phacelia sericea
Phacelia sericea 4793.JPG
P. sericea ssp. sericea
Status TNC G5.svg
Secure  (NatureServe) [1]
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Boraginales
Family: Boraginaceae
Genus: Phacelia
Species:
P. sericea
Binomial name
Phacelia sericea
Subspecies

P. sericea ssp. ciliosa (Rydb.) Gillett
P. sericea ssp. sericea (Graham) A. Gray

Contents

Phacelia sericea, the silky phacelia or blue alpine phacelia, is a showy perennial species of Phacelia endemic to western North America. [2] It grows mainly at subalpine to alpine elevations in forest openings or above treeline among rocks and sand. [3] [4] Sericea comes from the Latin sericeus, or silky, referring to the fine hairs on the leaves and stem.

Description

Phacelia sericea consists of several upright or ascending stems to 0.6 m (2 ft) from a tap-rooted, branched woody base. Its leaves are pinnatifid with cleft or entire segments. The basal leaves are somewhat larger than the upper cauline leaves and are more persistent and petiolate. The leaves and stems are generally covered with silvery silky hairs but are scarcely glandular.

P. sericea ssp. sericea flower Phacelia sericea 5278.JPG
P. sericea ssp. sericea flower

The inflorescence consists of several short panicles, tightly packed, at the end of the stem, resembling a bottle-brush. The dark blue to purple bell-shaped corolla is 4–6 mm across. It is hairy inside and out but not glandular. The filaments are two to three times as long as the corolla and give the inflorescence a fuzzy appearance. The anthers are bright yellow or orange and the style is shortly cleft. The fruit consists of two-chambered capsules with 8 to 18 seeds. [2] [5]

Range and Habitat

Phacelia sericea is a subalpine to alpine species of open well-drained slopes, usually above 1500 m elevation, it is found in the mountains of Vancouver Island, the southern British Columbia Pacific Ranges, the Rocky Mountains from Banff National Park to southern Colorado, Olympic National Park, the Cascade Range of Washington, the mountains of eastern Oregon and the northernmost counties of California, and the mountains of Idaho, Nevada and Utah. [6] It generally blooms from near the end of May through the end of August. [6]

Subspecies

Two subspecies are recognized.

Where the ranges overlap, P. sericea ssp. ciliosa occurs at a lower elevation than ssp. sericea. These are listed as subspecies by the USDA PLANTS database and ITIS, and as varieties by Jepson and Hitchcock. [2] [7]

Uses

Phacelia sericea is listed by the Federal Highway Administration as a native species suitable for landscaping along roadsides in Colorado. [8] It should be handled with care as the long flower hairs have been reported to irritate skin. [9]

Related Research Articles

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References

  1. NatureServe (2023). "Phacelia sericea". Arlington, Virginia. Retrieved 22 November 2023.
  2. 1 2 3 Copyright © by the Regents of the University of California (1993). "UC/JEPS: Jepson Manual treatment for PHACELIA sericea var. ciliosa". Treatment from the Jepson Manual. Regents of the University of California and University and Jepson Herbaria (UC/JEPS). Retrieved 2008-08-16.
  3. Mark Turner & Phyllis Gustafson: Wildflowers of the Pacific Northwest Portland, Or. : Timber Press, c2006., ISBN   0-88192-745-7
  4. Pojar, Jim (2004). Plants of the Pacific Northwest Coast. Edmonton: Lone Pine Publishing. ISBN   978-1-55105-530-5.
  5. 1 2 Hitchcock, C. Leo; Arthur Cronquist (1973). Flora of the Pacific Northwest; an illustrated manual . Seattle: University of Washington Press. ISBN   0-295-95273-3.
  6. 1 2 Sullivan, Steven. K. (2013). "Phacelia sericea". Wildflower Search. Retrieved 2013-03-17.
  7. USDA, NRCS (2008). "The PLANTS Database". National Plant Data Center, Baton Rouge, LA 70874-4490 USA. Retrieved 2008-08-19.
  8. Federal Highway Administration. "State Plant Listings: Colorado". Roadside Use of Native Plants. United States Department of Transportation. Archived from the original on 2008-07-23. Retrieved 2008-08-24.
  9. Reiner, Ralph E. (1969). Introducing the Flowering Beauty of Glacier National Park and the Majestic High Rockies. Glacier Park, Inc. p. 90.