Rorippa palustris

Bog yellow cress

Family: Brassicaceae · Type: perennial · Native

Bog yellow cress is a California native perennial found in wetland and riparian habitats across various bioregions at low to moderate elevations. Flowering from April to September, this plant produces small yellow flowers approximately 2 millimeters wide in elongated clusters. Growing with erect, branched stems 15 to 100 centimeters tall, it has a distinctive growth habit with early-deciduous basal rosettes. Its leaves are pinnately divided, with cauline leaves 2.5 to 10 centimeters long featuring lateral lobes that are oblong or ovate, ranging from nearly entire to slightly toothed. The plant produces slender, curved fruit pods 4 to 10 millimeters long containing 20 to 90 small ovoid seeds.

California counties: Orange, Riverside, San Luis Obispo, Fresno, San Joaquin, San Diego, Los Angeles, Madera, Sutter, Contra Costa, Plumas, Tulare, Kings, Shasta, Kern, Mono, Sacramento, Merced, Humboldt, Inyo, Placer, Sonoma, Modoc, Santa Cruz, Butte, Marin, Stanislaus, Ventura, 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.