Juncus nevadensis var. inventus
Dune rush
Photo: parent species Juncus nevadensis · (c) Gabriel Campbell-Martinez, some rights reserved (CC BY) · licence
Family: Juncaceae · Type: Grass · Native
Conservation status: CNPS 2B.2
Juncus nevadensis var. inventus (Dune rush) is a native California grass in the Juncaceae family, recognized by coastal dune habitat specialist.
Dune rush is a rare (CNPS 2B.2) California native perennial found in northern Coast Ranges in coastal peatlands and dune swales at elevations below 20 meters. Flowering time not specified, this plant produces dark brown flowers in compact clusters of 25 to 45 blooms. Growing 10 to 30 centimeters tall with slightly flattened green or bluish-green stems, it has distinctive leaf sheaths with small 2 to 3 millimeter appendages. Its leaves feature prominent crosswalls and a flattened structure, creating a distinctive linear appearance across coastal habitats. The plant's flower parts are relatively uniform, with perianth segments measuring 3 to 4.5 millimeters long.
Identification and appearance
Key characters: 26 sympatric species; coastal dune habitat specialist
Habitat and range
Habitat: Coastal peatlands, dune swales
Elevation: < 20 m
Outside California: to southern Washington
Conservation status
CNPS 2B.2
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 nevadensis var. inventus native to California?
Yes. Juncus nevadensis var. inventus is native to California (recorded as native).
What plant family does Juncus nevadensis var. inventus belong to?
Juncus nevadensis var. inventus is in the Juncaceae family, genus Juncus.
Is Juncus nevadensis var. inventus rare or endangered?
Juncus nevadensis var. inventus carries California Rare Plant Rank 2B.2, state rank S1.
What habitat does Juncus nevadensis var. inventus grow in?
Juncus nevadensis var. inventus grows in Coastal peatlands, dune swales.
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.