Taxon Report

Juncus duranii Ewan

Duran's rush

Print Report

Taxon Summary

Juncus duranii, commonly known as Duran's rush, is a perennial rhizomatous herb in the Juncaceae that is found only in California. It occurs within Lower montane coniferous forest, Meadows and seeps, and Upper montane coniferous forest, growing at elevations from 1768 to 2804 meters. Juncus duranii is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.

Classification


Scientific Name:	Juncus duranii Ewan
Common Name:	Duran's rush
Family:	Juncaceae
Element Code:	PMJUN013T0
USDA Plants Symbol:	JUDU3
Synonyms/Other Names:	Juncus mertensianus Bong. var. duranii (Ewan) F.J. Herm.

Ecology and Life History


Lifeform:	perennial rhizomatous herb
Blooming Period: Jul-Aug	Jul-Aug
Elevation:	1768-2804 (5800-9200)
General Habitats:	Lower montane coniferous forest, Meadows and seeps, Upper montane coniferous forest
Microhabitat:	Mesic
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	4.3
Global Rank:	G3
State Rank:	S3
State List:	None
Fed List:	None
Other Status:
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	0
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	0

Location


California Endemic: True
California Counties and Islands: Name (Code)
Los Angeles (LAX), Riverside (RIV), San Bernardino (SBD)
Quads: Name (Quad Code)
Big Bear Lake (3411628), Crystal Lake (3411737), Cucamonga Peak (3411725), Forest Falls (3411618), Mount San Antonio (3411736), San Bernardino North (3411723), San Gorgonio Mtn. (3411617), San Jacinto Peak (3311676), Silverwood Lake (3411733), Telegraph Peak (3411735), Waterman Mtn. (3411738), Yucaipa (3411711)

Threat List Data from the CNDDB


Threat List Total:	0
EOs with Threat Listed:	Total EOs	% of EOs
	0	0 %

Notes




Threats:
Threatened by development, hydrological alterations, and water diversion.
Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 17 September 2025].