Agrostis idahoensis

Idaho redtop, Idaho Redtop

Family: Poaceae · Type: perennial · Native

Idaho redtop is a California native perennial found in northwestern California, the Cascade Range, Sierra Nevada, northern San Francisco Bay Area, San Bernardino Mountains, San Jacinto Mountains, and White and Inyo Mountains in open, wet meadows and conifer forests at elevations up to 3,500 meters. Flowering from July to August, this plant produces delicate, pale grass-like flowers in loose, lanceolate panicles 3 to 13 centimeters long. Growing with slender stems 8 to 30 centimeters tall, it forms clumps with both basal and stem leaves. Its leaves are narrow, often 1 to 5 centimeters long and 0.5 to 2 millimeters wide, typically flat but becoming slightly inrolled as they mature. The grass has tiny, pale spikelets with glumes 1.5 to 2.5 millimeters long and lemmas without awns.

Habitat: Open, wet meadows, conifer forest

Bloom period: Jul-Aug

Elevation: < 3500 m

Bioregions: NW, CaR, SN, n SnFrB, SnBr, SnJt, W&ampI

California counties: Los Angeles, Alpine, Amador, Butte, El Dorado, Fresno, Humboldt, Inyo, Kern, Lassen, Mariposa, Mono, Nevada, Placer, Riverside, San Bernardino, Siskiyou, Tehama, Tulare, Tuolumne, Calaveras, Madera, Yuba, Trinity, Shasta, Plumas, Sierra, Modoc, Mendocino

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