Juncus luciensis
Santa lucia dwarf rush, Santa Lucia Dwarf Rush
(c) Matt Berger, some rights reserved (CC BY), uploaded by Matt Berger · licence
Family: Juncaceae · Type: Grass · Native
Conservation status: CNPS 1B.2
Juncus luciensis (Santa lucia dwarf rush) is a native California grass in the Juncaceae family, recognized by extremely small annual with hair-like stems.
Santa lucia dwarf rush is a rare (CNPS 1B.2) California native annual found in the northern Sierra Nevada Highlands, Sierra Coastal Ranges, Transverse Ranges, Peninsular Ranges, and Modoc Plateau in wet, sandy soils of seeps, meadows, vernal pools, streams, and roadsides at elevations of 300 to 1,900 meters. Flowering from spring to summer, this delicate rush produces tiny green flowers with dark red midvein tips, emerging individually or rarely in pairs on hair-like stems. Growing as a dense, pale yellow-green tufted plant just 0.4 to 6.2 centimeters tall, it forms compact clusters in moist habitats. Its basal leaves are very short, less than 1.5 centimeters long, with stems exceptionally thin at 0.1 to 0.3 millimeters wide. The fruit is pale green to pale red, approximately equal in length to the flower perianth, containing 2 to 3 chambers with small, obviously striated seeds.
Identification and appearance
Key characters: 53 sympatric species; extremely small annual with hair-like stems
Habitat and range
Habitat: Wet, sandy soils of seeps, meadows, vernal pools, streams, roadsides
Elevation: 300-1900 m
California counties: Lassen, Monterey, San Luis Obispo, Riverside, San Diego, Santa Barbara, Shasta, Nevada, Plumas, Napa, San Benito, Modoc
Conservation status
CNPS 1B.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 luciensis native to California?
Yes. Juncus luciensis is native to California (recorded as native).
Where in California does Juncus luciensis grow?
Juncus luciensis occurs in Lassen, Monterey, San Luis Obispo, Riverside, San Diego, Santa Barbara, Shasta, Nevada and other counties, at elevations of 300-1900 m.
What plant family does Juncus luciensis belong to?
Juncus luciensis is in the Juncaceae family, genus Juncus.
Is Juncus luciensis rare or endangered?
Juncus luciensis carries California Rare Plant Rank 1B.2, state rank S3.
What habitat does Juncus luciensis grow in?
Juncus luciensis grows in Wet, sandy soils of seeps, meadows, vernal pools, streams, roadsides.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora · CNPS Rare Plant Inventory · Index of California Plant Names · 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.