Juncus dudleyi
Dudley's rush
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Family: Juncaceae · Type: Grass · Native
Conservation status: CNPS 2B.3
Juncus dudleyi (Dudley's rush) is a native California grass in the Juncaceae family, recognized by montane habitat, small yellowish appendages, and spreading perianth in fruit.
Dudley's rush is a native perennial herb found in the Klamath Ranges, northern Sierra Nevada High, and Modoc Plateau in wet areas of montane conifer forest at elevations below 2,000 meters. Flowering in the summer months, this rush produces small, inconspicuous greenish-brown flowers with lanceolate perianth segments spreading in fruit. Growing in dense tufts 20 to 84 centimeters tall, it forms clustered clumps with stiff, slender stems. Its basal leaves are narrow, approximately 1 to 1.3 millimeters wide, with inrolled margins and distinctive scarious leaf sheaths featuring tiny, glossy yellow appendages. The fruit is widely ovoid and shorter than the perianth, with a single incomplete chamber containing small oblong seeds.
Identification and appearance
Key characters: 45 sympatric species; key features are montane habitat, small yellowish appendages, and spreading perianth in fruit
Habitat and range
Habitat: Wet areas in montane conifer forest
Elevation: < 2000 m
Outside California: to British Columbia, eastern North America
Conservation status
CNPS 2B.3
How to tell it apart
vs Schoenoplectus: Juncus has leaf blades present; Schoenoplectus is leafless with only bladeless sheaths at base.; vs Carex: Juncus has round or flattened stems; Carex has triangular stems you can feel.; vs Luzula: Run finger along leaf edge - smooth = Juncus, hairy = Luzula.; vs Elegia: Juncus has small individual flowers; Elegia has showy papery bracts and branching structure.; vs Cyperus: Juncus has round stems and capsules; Cyperus has triangular stems and lens-shaped achenes.
Frequently asked questions
Is Juncus dudleyi native to California?
Yes. Juncus dudleyi is native to California (recorded as native).
What plant family does Juncus dudleyi belong to?
Juncus dudleyi is in the Juncaceae family, genus Juncus.
Is Juncus dudleyi rare or endangered?
Juncus dudleyi carries California Rare Plant Rank 2B.3, state rank S1.
What habitat does Juncus dudleyi grow in?
Juncus dudleyi grows in Wet areas in montane conifer forest.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora · CalPhotos · CDFW CNDDB
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.