Howellanthus dalesianus

Scott Mountain howellanthus, Scott Mountain Phacelia

Family: Hydrophyllaceae · Type: perennial · Native

Conservation status: CNPS 4.3

Scott Mountain howellanthus is a rare (CNPS 4.3) California native perennial found in the Klamath Ranges on ultramafic substrates, meadows, streambanks, and conifer forests at elevations of 1,500 to 2,000 meters. Flowering from May to August, this plant produces white flowers with purple-marked throats, typically 5 to 10 millimeters long with a rotated limb 5 to 15 millimeters in diameter. Growing as a compact herb 5 to 15 centimeters tall, it emerges from a thick woody caudex with decumbent glandular-hairy stems. Its basal rosette features oblong to elliptic leaves 10 to 50 millimeters long, with blade length approximately equal to its petiole. The fruit is a small, hairy, nearly spherical structure about 4 millimeters in size, containing 2 to 4 seeds with a distinctive honeycombed or pitted surface.

Habitat: Ultramafic substrates, meadows, streambanks, conifer forest

Bloom period: May-Aug

Elevation: 1500-2000 m

Bioregions: KR.

California counties: Siskiyou, Trinity

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