Trifolium siskiyouense J.M.Gillett (1980:1441)
Siskiyou clover
Taxonomy & Nomenclature
Conservation Status
Missing (NatureServe, 2026)
Last record: 1935 (NatureServe, 2026)
Distribution & Habitat
Oregon & Washington, USA
Anatomy & Morphology
Biology & Ecology
Hypodigm
Media
References
Original scientific description:
Gillett, J. M. (1980). Taxonomy of Trifolium (Leguminosae). V. The perennial species of section Involucrarium. Canadian Journal of Botany 58(13): 1441-1442.
Other references:
Flora of North America Editorial Committee (FNA). (2023). Flora of North America north of Mexico. Vol. 11. Magnoliophyta: Fabaceae, parts 1+2. Oxford Univ. Press, New York. xxvii + 1108 pp.
Gillett, J. M., Taylor, N. L. and Collins, M. (ed.). (2001). The world of clovers. Blackwell Publishing, Ames, IA. 470 pp.
Isely, D. (1993). Trifolium, pp. 646-654. In: Hickman, J. C. (ed.). The Jepson Manual: Higher Plants of California. University of California Press, Berkeley.
Isely, D. (1998). Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii). Monte L. Bean Life Science Museum, Brigham Young University; MLBM Press, Provo, Utah. 1007 pp.
Kartesz, J. T. (1994). A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Kartesz, J. T. (1999). A synonymized checklist and atlas with biological attributes for the vascular flora of the United States, Canada, and Greenland. First edition. In: Kartesz, J.T., and C.A. Meacham. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden, Chapel Hill, N.C.
NatureServe. (2026). Trifolium siskiyouense: Siskiyou Clover. NatureServe Network Biodiversity Location Data accessed through NatureServe Explorer [web application]. NatureServe, Arlington, Virginia. Available at: https://explorer.natureserve.org/ [Accessed on 18 August 2026]
Oregon Biodiversity Information Center. (2019). Rare, Threatened and Endangered Species of Oregon. Institute for Natural Resources, Portland State University, Portland, Oregon. 133 pp. [p. 95]
Slakey, D., Sims, A. and Bittman, R. (2014). Rare plant status review: Trifolium siskiyouense. California Native Plant Society and California Natural Diversity Database. Online.
Vincent, M. (2012). Trifolium, pp. 789-798. In: Baldwin, B. G., Goldman, D. H., Keil, D. J., Patterson, R., Rosatti, T. J. and Wilken, D. H. (eds.). The Jepson manual: vascular plants of California. 2nd edition. Berkeley, CA: University of California Press. 1568 pp.