Streptanthus oblanceolatus

Trinity river jewelflower, Trinity River Jewelflower

Family: Brassicaceae · Type: biennial · Native

Conservation status: CNPS 1B.2

Trinity river jewelflower is a rare (CNPS 1B.2) California native biennial found in the Klamath Ranges on cliffs, canyon walls, and in conifer forest at elevations around 400 meters. Flowering from June to July, this plant produces yellow flowers with recurved petals 12 to 16 millimeters long, forming delicate inflorescences. Growing with branched stems 50 to 100 centimeters tall, it develops a distinctive structure with multiple stem heights and varied leaf configurations. Its leaves range from basal rosettes of oblanceolate shape with coarse teeth to mid-stem lance-linear leaves 2 to 10 centimeters long, with progressively smaller upper stem leaves. The fruit develops as a slender, spreading-ascending pod 4 to 8 centimeters long, with narrow valves and seeds approximately 2 millimeters in length.

Habitat: Cliffs, canyon walls, in conifer forest

Bloom period: Jun-Jul

Elevation: +- 400 m.

Bioregions: KR.

California counties: Trinity

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