Holosteum umbellatum subsp. umbellatum

Family: Caryophyllaceae · Type: annual · Not Native

Holosteum is a naturalized annual found in the Klamath Ranges, Cascade Range, and central Coast Ranges in disturbed areas and roadsides at elevations below 1,270 meters. Flowering from late winter to early spring, this plant produces delicate white petals that are narrowly elliptic in shape. Growing with slender stems 5 to 25 centimeters tall, it features glandular hairs concentrated near the middle of the stem. Its cauline leaves occur in 1 to 4 pairs in the lower half of the plant, with blades 2 to 30 millimeters long that are either glabrous or have glandular hairs along the margins. Small seeds are compressed with a marginal ridge and low, rounded tubercles.

Habitat: Uncommon. Disturbed areas, roadsides

Bloom period: Late winter-early spring

Elevation: < 1270 m

Bioregions: KR, CaR, CCo?, MP

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