Erythranthe percaulis

Serpentine canyon monkeyflower

Family: Phrymaceae · Type: annual · Native

Conservation status: CNPS 1B.1

Serpentine canyon monkeyflower is a rare (CNPS 1B.1) California native annual found in serpentine cliff environments at elevations around 2,800 meters. Flowering from May to June, this diminutive plant produces bright yellow flowers with delicate, asymmetrical petals. Growing extremely small at just 3 to 5 centimeters tall, the plant forms a compact, glabrous structure with reduced stems. Its leaves are narrow and oval-shaped, measuring 4 to 10 millimeters long, with distinctive palm-like veining. Each flower emerges on a slender pedicel 15 to 35 millimeters long, with an unusual calyx featuring unequal lobes that curve upward in fruit.

Habitat: Crevices in serpentine cliffs

Bloom period: May-Jun

Elevation: 2800 m

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