2024 Ryan O'Dell 2024 Ryan O'Dell 2024 Ryan O'Dell 2024 Ryan O'Dell 2024 Ryan O'Dell 2024 Ryan O'Dell 2024 Ryan O'Dell 2024 Ryan O'Dell Rick York and CNPS 1990 Dean Wm. Taylor
Streptanthus howellii is a perennial herb that is native to California, and also found in Oregon.
California Rare Plant Rank: 1B.2 (rare, threatened, or endangered in CA and elsewhere).
[Wikipedia] Range, Threats: Streptanthus howellii is an uncommon species of flowering plant in the mustard family known by the common name Howell's jewelflower.[1] It is endemic to the Klamath Mountains of southern Oregon and northern California. It grows in mountain forests on serpentine soils.
This rare plant is threatened by wildfire suppression; it would be more common if its habitat were allowed its natural fire regime.[2] It is also threatened by mining operations.[3] (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: 05/18/2025).