Rumex transitorius

Willow dock

Family: Polygonaceae · Type: perennial · Native

Willow dock is a California native perennial found in coastal regions including North Coast, Sierra Nevada, Central Coast, and Sacramento Valley in coastal dunes and wet meadow margins at elevations up to 2,250 meters. Flowering from April to June, this plant produces small flowers in dense, interrupted whorls with thread-like pedicels. Growing with decumbent to erect stems 25 to 70 centimeters tall, it develops simple or branched stems with axillary shoots. Its lance-linear to lanceolate leaves measure 6 to 15 centimeters long, with entire to slightly wavy margins and tapered bases. The fruit is dark red-brown, approximately 2 millimeters long with three unequal tubercles.

Habitat: Coastal dunes, wet margins of meadows

Bloom period: Apr-Jun

Elevation: < 2250 m

Bioregions: NCo, NCoRH, SNH, CCo, reported from ScV

California counties: Contra Costa, Alameda, Butte, El Dorado, Lake, Lassen, Monterey, Napa, Nevada, Plumas, San Benito, San Francisco, Santa Barbara, Solano, Sutter, Trinity, Tuolumne, Ventura, Del Norte, Humboldt, Kern, Marin, Mendocino, San Mateo, Santa Clara, Sonoma, Modoc, Santa Cruz, San Luis Obispo, Alpine, Sacramento, Yolo, Fresno

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