- Biennial or short-lived perennial herb, 1 to 6 feet tall
- Hooker’s Evening Primrose is very similar to ssp. sutissima. Distinguished by the reddish glandular blister markings on the stems of hookeri.
- Thrives in coastal areas and needs very little water
- Found in Molate, Flatlands, Diablo, Niles Canyon and Valley sections, also reported in Bay hills section
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