Potentilla uliginosa

Cunningham marsh cinquefoil, Cunningham Marsh Cinquefoil

Family: Rosaceae · Type: perennial · Native

Conservation status: CNPS 1A

Cunningham marsh cinquefoil is a rare (CNPS 1A) California native perennial found in southern North Coast Ranges in Sonoma County's low-nutrient wetlands at elevations of 30 to 40 meters. Flowering from May to August, this plant produces white flowers approximately 6 to 10 millimeters long with delicate petals. Growing with prostrate to decumbent stems 25 to 50 centimeters long, it forms rosetted tufts from a thick taproot. Its pinnate basal leaves feature 6 to 10 leaflets per side, with wedge-shaped to fan-shaped segments 1.2 to 2.2 millimeters long, unevenly toothed along their edges. Historically found at Cunningham Marsh, this plant is now presumed extinct.

Habitat: Presumed extinct. Low-nutrient wetlands

Bloom period: May-Aug

Elevation: 30-40 m

Bioregions: s NCoRO (Cunningham Marsh, Sonoma Co., at SnFrB boundary).

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