Calflora, a 501c3 non-profit
Distribution by County   928    
Astragalus pycnostachyus  A. Gray  var. pycnostachyus 
Marsh milk vetch, Marsh milkvetch
Astragalus pycnostachyus var. pycnostachyus is a perennial herb that is native to California, and endemic (limited) to California.
California Rare Plant Rank: 1B.2 (rare, threatened, or endangered in CA and elsewhere)
Record Count by County

Humboldt: 6 Marin: 27 San Mateo: 43

Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria. [web application]. 2026. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 06/13/2026).