Tiarella trifoliata var. trifoliata

Threeleaf foamflower

Family: Saxifragaceae · Type: perennial · Native

Conservation status: CNPS 3.2

Threeleaf foamflower is a California native perennial found in the Klamath Ranges and northern Coast Ranges of Humboldt County in moist shady streambanks at elevations below 1,500 meters. Flowering from June to August, this plant produces delicate white flowers in small clusters. Growing with slender stems 15 to 40 centimeters tall, it forms clumps with distinctive compound leaves. Its leaves are broadly divided into three leaflets, each 3 to 9 centimeters wide, with sharply toothed edges and a delicate, lacy appearance. The plant creates soft, foam-like clusters of white flowers that give it its charming common name.

Habitat: Moist shady streambanks

Bloom period: Jun-Aug

Elevation: < 1500 m

Bioregions: KR (Humboldt Co., expected elsewhere), n NCoRO

California counties: Mendocino

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