| Documentation |
State |
Type |
| California Native Plant Society. Inventory of rare and endangered plants. |
CA |
Literature |
| Hickman, J.C. (ed.). 1993. The Jepson manual. University of California Press, Berkeley. |
CA |
Literature |
| Oregon Natural Heritage Information Center. 2004. Rare, threatened and endangered species of Oregon (5 May 2006). Oregon Natural Heritage Information Center, Oregon. |
|
Literature |
| Peck, M.E. 1961. A manual of the higher plants of Oregon, 2nd ed. Oregon State University Press, Corvallis. |
OR |
Literature |
| Specimen at Oregon Natural Heritage Information Center, Portland, Oregon. |
OR |
Specimen |
| Threatened and endangered plants (1 October 2011). California Department of Fish and Game. |
|
Literature |
| U.S. Fish and Wildlife Service. 1988. National list of vascular plant species that occur in wetlands. U.S. Fish & Wildlife Service Biological Report 88 (26.9). |
|
Literature |
| U.S. Fish and Wildlife Service. 1993. 1993 supplement to list of plant species that occur in wetlands: Northwest (Region 9). Supplement to U.S. Fish & Wildlife Service Biological Report 88 (26.9). |
|
Literature |
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