Juncus articulatus subsp. articulatus
Jointed rush, Jointed Rush
Christian Fischer (via Wikimedia Commons) · CC BY-SA
Family: Juncaceae · Type: Perennial · Native
Juncus articulatus subsp. articulatus (Jointed rush) is a native California perennial in the Juncaceae family, recognized by . Key features: rooting nodes, crosswalls complete, dark 3-angled fruit.
Jointed rush is a native perennial found in coastal, northern California, Klamath Ranges, northern Sierra Nevada, and desert mountain regions in moist ground, seeps, shores, and marshes at elevations below 2,000 meters. Flowering from summer to fall, this rush produces green to dark brown flowers in small clusters with 3 to 12 blossoms. Growing 10 to 60 centimeters tall with erect or ascending stems that root at nodes, it forms a short, branching rhizome. Its cauline leaves are cylindric or occasionally flattened, 5 to 10 centimeters long with loose sheaths and rounded appendages. The fruit is dark brown to black, three-angled, and longer than the perianth, with tiny oblong seeds.
Identification and appearance
Key characters: 72 sympatric species. Key features: rooting nodes, crosswalls complete, dark 3-angled fruit
Habitat and range
Habitat: Moist ground, seeps, shores, marshes
Elevation: < 2000 m
Outside California: to Alaska, eastern North America, Eurasia, Africa
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 articulatus subsp. articulatus native to California?
Yes. Juncus articulatus subsp. articulatus is native to California (recorded as native).
What plant family does Juncus articulatus subsp. articulatus belong to?
Juncus articulatus subsp. articulatus is in the Juncaceae family, genus Juncus.
What habitat does Juncus articulatus subsp. articulatus grow in?
Juncus articulatus subsp. articulatus grows in Moist ground, seeps, shores, marshes.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora · Index of California Plant Names · CalPhotos
Last updated 2026-09-30
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.