Luzula subcongesta
Donner wood rush
(c) Steve Matson, some rights reserved (CC BY) · licence
Family: Juncaceae · Type: Grass · Native
Luzula subcongesta (Donner wood rush) is a native California grass in the Juncaceae family, recognized by open branched panicles and blue-green color.
Donner wood rush is a California native perennial found in the Klamath Ranges, high Cascade Range, and Sierra Nevada Mountains in alpine to subalpine moist places at elevations of 2,000 to 3,500 meters. Flowering from July to August, this plant produces small dark brown flowers in dense, branched panicles 3.5 to 19 centimeters long. Growing as a tufted plant 18 to 45 centimeters tall with a blue-green appearance and often short horizontal rhizomes, it forms distinctive clumps in high-elevation landscapes. Its flat basal leaves can reach up to 15 centimeters long and 3 to 9 millimeters wide, with acute tips that give the plant a delicate, grass-like texture. The plant produces ovoid fruits slightly shorter than the dark brown perianth parts, with lustrous dark brown seed valves.
Identification and appearance
Key characters: 6 sympatric species; distinguished by open branched panicles and blue-green color
Habitat and range
Habitat: Alpine to subalpine moist or wet places
Elevation: 2000-3500 m
California counties: Mono, Alpine, El Dorado, Fresno, Madera, Nevada, Siskiyou, Tulare, Tuolumne, Inyo, Modoc, Sierra, Shasta, Mariposa, Placer, Humboldt
Outside California: to western Nevada
Bloom period
Luzula subcongesta blooms Jul-Aug.
How to tell it apart
vs Juncus: Run finger along leaf edge - hairy = Luzula, smooth = Juncus.; vs Carex: Luzula has hairy leaf margins; Carex has smooth margins and triangular stems.
Frequently asked questions
Is Luzula subcongesta native to California?
Yes. Luzula subcongesta is native to California (recorded as native).
When does Luzula subcongesta bloom?
Luzula subcongesta blooms Jul-Aug.
Where in California does Luzula subcongesta grow?
Luzula subcongesta occurs in Mono, Alpine, El Dorado, Fresno, Madera, Nevada, Siskiyou, Tulare and other counties, at elevations of 2000-3500 m.
What plant family does Luzula subcongesta belong to?
Luzula subcongesta is in the Juncaceae family, genus Luzula.
What habitat does Luzula subcongesta grow in?
Luzula subcongesta grows in Alpine to subalpine moist or wet places.
Related species
Other California species in the same genus, family, or bioregion.
- Luzula subsessilis — Pacific woodrush
- Luzula cascadensis
- Luzula comosa — Common wood rush
- Luzula comosa var. comosa — Hairy wood rush
- Luzula comosa var. laxa — Hairy wood rush
- Luzula divaricata
- Juncaceae sp. — Rush family
- Juncus acuminatus — Tapered rush
- Juncus acutus subsp. leopoldii — Southwestern spiny rush
Sources: Jepson eFlora · Index of California Plant Names · CalPhotos
Last updated 2026-10-07
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.