Poa trivialis subsp. trivialis

Rough blue grass

Family: Poaceae · Type: perennial

Rough blue grass is a naturalized perennial found in disturbed moist places at elevations below 700 meters. Flowering from April to July, this grass produces small green-tinted spikelets with delicate flower clusters. Growing in dense clumps or with short spreading stolons, it forms low-growing clusters 30 to 50 centimeters tall. Its leaf sheaths are rough-textured with prominent ligules 3 to 7 millimeters long, and individual leaves have a scabrous (slightly scratchy) surface. The small lemmas are 2 to 3 millimeters long with glabrous marginal veins.

Habitat: Disturbed moist places

Bloom period: Apr-Jul

Elevation: < 700 m

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