Camissonia sierrae subsp. alticola

Mono hot springs evening-primrose, Mono Hot Springs Evening-Primrose

Family: Onagraceae · Type: annual · Native

Conservation status: CNPS 1B.2

Mono hot springs evening-primrose is a rare (CNPS 1B.2) California native annual found in central Sierra Nevada Mountains in Mariposa and northeastern Fresno counties, growing on shallow granite outcrops and ponderosa-pine forest at elevations of 2,000 to 2,350 meters. Flowering from May to July, this plant produces delicate pale yellow to white flowers approximately 4 millimeters long with subtle serrated petals. Growing with slender, branching stems typically 10 to 30 centimeters tall, it forms compact clusters in rocky alpine environments. Its leaves are lanceolate with several small teeth, arranged alternately along thin stems and colored a soft green. The plant's compact growth and distinctive leaf structure make it well-adapted to high-elevation granite landscapes.

Habitat: Shallow soil on granite outcrops, ponderosa-pine forest

Bloom period: May-Jul

Elevation: 2000-2350 m

Bioregions: c SNH (Mariposa, ne Fresno cos.).

California counties: Fresno, Mariposa

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