Trifolium siskiyouense

The plant species is native to northwestern California and southwestern Oregon, in the Klamath Mountains. It is reported from only 5 counties: Shasta and Siskiyou Counties in California; and Josephine, Douglas and Jackson Counties in Oregon.[http://bonap.net/MapGallery/County/Trifolium%20siskiyouense.png BONAP's (Biota of North America Program) North American Plant Atlas]

The type specimen was collected in 1904 near Grants Pass in Josephine County, Oregon. Part of its range is protected within the Klamath National Forest.

The plant grows in wet mountain meadows at elevations of {{convert|800|-|1400|m|ft|abbr=on}}.

Trifolium siskiyouenseis a glabrous, perennial herb with thickened roots but no rhizomes. Leaves are trifoliate with lanceolate stipules; leaflets are elliptic to oblanceolate, up to {{convert|3|cm|in|abbr=on}} long. Flowers are white to cream-colored.[http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=47168 Jepson Flora Project]Gillett, John Montague. 1980. Taxonomy of Trifolium (Leguminosae). V. The perennial species of section Involucrarium. Canadian Journal of Botany 58: 1425–1448.Isely, Duane. 1998. Native and Naturalized Leguminosae (Fabaceae) of the United States 936.Zohary, M. & D. Heller. 1984. Genus ~Trifolium~ i–x, 1–606. Israel Academy of Sciences and Humanities, Jerusalem.

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siskiyouense

Category:Flora of California

Category:Flora of Oregon

Category:Flora of the Klamath Mountains

Category:Natural history of the California Coast Ranges

Category:Natural history of Siskiyou County, California

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Category:Critically endangered flora of California

Category:Flora without expected TNC conservation status

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