Holodiscus discolor var. glabrescens

Rock spiraea

Family: Rosaceae · Type: shrub · Native

Rock spiraea is a California native shrub found in the high Cascade Range, northern Coast Ranges, and Mendocino County in rocky places and outcrops at elevations of 600 to 3,020 meters. Flowering from June to August, this plant produces small white flowers in dense clusters 2 to 8 centimeters long. Growing 0.3 to 1 meter tall with a dense, compact form, it has twigs that are glabrous to slightly hairy. Its leaves are round to obovate, 0.3 to 3 centimeters long, with wedge-shaped bases and entire teeth near the leaf tip, and slightly visible veins on both surfaces. The plant's delicate branching and small leaves give it a fine-textured, compact appearance in rocky mountain habitats.

Habitat: Rocky places, outcrops

Bloom period: Jun-Aug

Elevation: 600-3020 m

Bioregions: CaRH, NCoRH (Mendocino Co.), MP

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