Neoholmgrenia andina

Plateau evening primrose

Family: Onagraceae · Type: annual · Native

Plateau evening primrose is a California native annual found in the Cascade Range and Modoc Plateau in seasonally moist flats and sagebrush scrub to pinyon and juniper woodland at elevations of 1,200 to 2,000 meters. Flowering from May to July, this plant produces small, delicate pale yellow or white flowers with petals less than 2.5 millimeters long. Growing with diminutive stems just 1 to 15 centimeters tall, it forms a compact, minutely hairy plant with an erect growth habit. Its numerous leaves are narrow and oblanceolate, measuring 10 to 30 millimeters long and covered in short strigose hairs. The ascending fruits are slender, measuring 5 to 10 millimeters in length and less than 1.5 millimeters wide.

Habitat: Seasonally moist flats, generally clay soil, sagebrush scrub to pinyon/juniper woodland

Bloom period: May-Jul

Elevation: 1200-2000 m

Bioregions: CaRH, MP

Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Jepson eFlora, Cal-IPC, and more.