Ivesia webberi

Webber's ivesia

Family: Rosaceae · Type: perennial · Native

Conservation status: CNPS 1B.1 · Threatened

Webber's ivesia is a rare (CNPS 1B.1) California native perennial found in northern Sierra Nevada and southern Modoc Plateau regions, specifically in Dog Valley, eastern Sierra County, and Sierra Valley, growing in rocky clay sagebrush flats at elevations of 1,500 to 1,900 meters. Flowering from May to June, this plant produces bright yellow flowers in small clusters 15 to 50 millimeters wide, with delicate oblanceolate petals. Growing with decumbent to ascending green stems 5 to 15 centimeters tall, it forms a distinctive rosette with a generally simple caudex. Its complex leaves feature 4 to 8 leaflets per side, with linear to lanceolate lobes 3 to 10 millimeters long, and have strigose sheathing bases. The small fruits are light brown with darker mottling, approximately 2.5 millimeters long and nearly smooth.

Habitat: Rocky clay in sagebrush flats

Bloom period: May-Jun

Elevation: 1500-1900 m

Bioregions: n SNH (Dog Valley, e Sierra Co.), s MP (Sierra Valley)

California counties: Sierra, Lassen, Plumas

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