Английская Википедия:Erigeron parishii
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Erigeron parishii is a species of flowering plant in the family Asteraceae known by the common names Parish's daisy and Parish's fleabane.[1][2]
Distribution
Erigeron parishii is native to San Bernardino County and Riverside County in southern California.[3][2] It is a federally-listed threatened species losing habitat to development and the limestone mining industry on the north slope of the San Bernardino Mountains.
Description
Erigeron parishii is a small perennial herb reaching a maximum height of about Шаблон:Convert. The taproot can penetrate the carbonate soils to a depth of Шаблон:Convert.[4] Its stem and foliage are covered in silvery-white hairs and most of the leaves are basal and measure Шаблон:Convert long.[1]
The erect stems have inflorescences of one to ten flower heads, each between one and two centimeters (0.4-0.8 inches) wide. The flower head has a center of golden yellow disc florets and a fringe of up to 55 lavender, pink, or white ray florets.[1]
Ecology
Erigeron parishii usually grows on limestone substrates, or granite topped with a layer of limestone.[5] It apparently requires very alkaline soils.[4][1]
Conservation
The same rock that the plant favors is also sought after for human use and limestone mining is the most significant threat to its habitat.[4]
Erigeron parishii has a relatively high genetic diversity for a narrow endemic, a measure that will decrease with the habitat fragmentation that currently threatens it.[6]
References
External links
- Jepson Manual Treatment — Erigeron parishii
- United States Department of Agriculture Plants Profile: Erigeron parishii
- US Fish & Wildlife Service, Conserving the Nature of America, Local Rare Plants (1997)
- Erigeron parishii — Calphotos Photo gallery, University of California
- ↑ 1,0 1,1 1,2 1,3 Flora of North America, Erigeron parishii A. Gray 1884. Parish’s fleabane
- ↑ 2,0 2,1 Calflora taxon report, University of California, Erigeron parishii A. Gray, Parish fleabane, Parish's daisy, Parish's fleabane
- ↑ Biota of North America Program 2014 county distribution map
- ↑ 4,0 4,1 4,2 Sanders, A. C. Erigeron parishii. Bureau of Land Management
- ↑ Erigeron parishii. The Nature Conservancy.
- ↑ Neel, M. C. and N. C. Ellstrand. (2001). Patterns of allozyme diversity in the threatened plant Erigeron parishii (Asteraceae). Am J Bot 88 810.
- Английская Википедия
- Erigeron
- Endemic flora of California
- San Bernardino Mountains
- Natural history of the California chaparral and woodlands
- Natural history of the Transverse Ranges
- Natural history of San Bernardino County, California
- Plants described in 1884
- Threatened flora of California
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