Rumex triangulivalvis

Willow dock

Family: Polygonaceae · Type: perennial · Native

Willow dock is a California native perennial found in the northern Sierra Nevada, central Sierra Nevada, Sutter Buttes, southern California's Great Basin, and Great Basin regions in many habitats, often in marginal or disturbed areas at elevations below 3,000 meters. Flowering from April to July, this plant produces small, inconspicuous greenish-brown flowers in dense, interrupted whorls along branching stems. Growing 3 to 10 decimeters tall with ascending to erect stems that develop axillary shoots, it forms a vertical taproot with short or absent rhizomes. Its leaves are linear to lanceolate, 6 to 17 centimeters long and 1 to 4 centimeters wide, with entire margins that may appear flat or slightly wavy. The fruit is small, measuring 1.7 to 2.2 millimeters long and ranging from brown to dark red-brown.

Habitat: Many habitats, often marginal or disturbed

Bloom period: Apr-Jul

Elevation: < 3000 m

Bioregions: CaRH, SN, ScV (Sutter Buttes), SnGb, GB

California counties: Lassen, Plumas, Mono, Modoc, El Dorado, Fresno, Kern, Madera, Riverside, Shasta, Sierra, Siskiyou, Tehama, Alpine, Butte, Inyo, Mariposa, Nevada, Placer, San Bernardino, Tulare, Tuolumne, Trinity, Del Norte, Sacramento

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