Calystegia peirsonii

Peirson's morning-glory, Peirson's Morning-Glory

Family: Convolvulaceae · Type: perennial · Native

Conservation status: CNPS 4.2

Peirson's morning-glory is a native perennial found in the western Transverse Ranges, northern San Gabriel Mountains, and adjacent Mojave Desert in rocky slopes at elevations of 1,000 to 1,500 meters. Flowering from May to June, this plant produces delicate white flowers 25 to 40 millimeters long with a distinctive corolla. Growing with decumbent to weakly climbing stems less than 40 centimeters tall, it emerges from an underground rhizome and appears slightly glaucous. Its leaves have narrowly triangular blades less than 2 centimeters long, with clearly defined lobes directed toward the base and a deep, narrowly rounded sinus. The plant has distinctive bracts 3 to 7 millimeters long that nearly hide the calyx, giving it a unique structural appearance.

Habitat: Rocky slopes

Bloom period: May-Jun

Elevation: 1000-1500 m

Bioregions: WTR, n SnGb, adjacent DMoj.

California counties: Los Angeles, Ventura, Marin

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