Calystegia collina subsp. collina

Family: Convolvulaceae · Type: perennial · Native

hill morning-glory is a California native perennial found in northern Coast Ranges, San Francisco Bay Area, and south-central Coast Ranges in open grassy or rocky serpentine places and oak/pine woodlands at elevations below 600 meters. Flowering from April to June, this plant produces white flowers with pink or cream tints, approximately 30 to 54 millimeters long. Growing with low-spreading stems 8 to 15 centimeters tall, it forms compact mats close to the ground. Its leaves are kidney-shaped to triangular with soft, largely indistinct lobes that blend smoothly into the stem. The plant's distinctive bracts are widely ovate, 8 to 15 millimeters long, which partially conceal the flower's calyx.

Habitat: Open grassy or rocky places or in open oak/pine woodland, often serpentine

Bloom period: Apr-Jun

Elevation: < 600 m

Bioregions: NCoR, SnFrB, SCoRO.

California counties: Colusa, Lake, Napa, Sonoma, Marin, Santa Clara, Monterey, Glenn, Santa Barbara

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