2019 Brittany Burnett 2021 Suzanne L. Weakley 2024 El Byrne 2022 Lynn Halsted 2013 David Magney 2019 Brittany Burnett 2023 R.A. Chasey 2013 David Magney 2013 David Magney 2008 Toni Corelli 2013 David Magney 2013 David Magney
Astragalus pycnostachyus is a perennial herb that is native to California, and endemic (limited) to California.
[Wikipedia] Variety Info: he species has two named varieties.
Astragalus pycnostachyus var. lanosissimus — Ventura marsh milkvetch,[2] now endemic to the Oxnard Plain in Ventura County, with only one population within Oxnard.[3] The single extant population of this rare plant variety is now fenced and protected. The variety is treated as an endangered species on the federal level.[4][3] Threats to its existence include near-total loss of habitat, infestation by weevils, cucumber mosaic virus infection, competition from non-native plants such as ice plant, and herbivory by the milk snail Otala lactea.
Astragalus pycnostachyus var. pycnostachyus — marsh milk vetch, primarily found in the San Francisco Bay Area.[5] (link added by Mary Ann Machi)
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Suggested Citation
Calflora:
Information on California plants for education, research and conservation,
with data contributed by
public and private institutions and individuals.
[web application]. 2025.The Calflora Database
[a non-profit organization].Available:
https://www.calflora.org/(Accessed: 05/23/2025).