Rumex crassus

Willow leaved dock

Family: Polygonaceae · Type: perennial · Native

Willow leaved dock is a California native perennial found in the North Coast and Central Coast bioregions in coastal dunes, sandy shores, and marshes at elevations below 100 meters. Flowering from February to July, this plant produces small flowers in dense axillary and terminal clusters. Growing with decumbent to ascending stems 20 to 50 centimeters tall, it develops numerous axillary shoots below the primary flowering stems. Its thick, leathery leaves are lance-ovate to elliptic, 3 to 12 centimeters long with entire margins and acute tips. The fruit is small, 2 to 2.5 millimeters long, ranging from brown to dark red-brown with a distinctive large, warty tubercle.

Habitat: Coastal dunes, sandy shores, marshes

Bloom period: Feb-Jul

Elevation: < 100 m

Bioregions: NCo, CCo

California counties: Del Norte, Santa Barbara, Humboldt, Marin, Mendocino, Monterey, San Francisco, San Luis Obispo, San Mateo, Santa Cruz, Sonoma, Ventura, Contra Costa

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