Taxon Report

Carex duriuscula C.A. Mey.

spikerush sedge

Print Report

Taxon Summary

Carex duriuscula, commonly known as spikerush sedge, is a perennial rhizomatous herb in the Cyperaceae that is found in California and elsewhere. It occurs within Great Basin scrub, and Subalpine coniferous forest, growing at elevations from 3500 to 4100 meters. Carex duriuscula is ranked 2B.3, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Not very threatened in California.

Classification


Scientific Name:	Carex duriuscula C.A. Mey.
Common Name:	spikerush sedge
Family:	Cyperaceae
Element Code:	PMCYP03GJ0
USDA Plants Symbol:	CADU6
Synonyms/Other Names:	Carex eleocharis

Ecology and Life History


Lifeform:	perennial rhizomatous herb
Blooming Period: Jul-Aug	Jul-Aug
Elevation:	3500-4100 (11485-13450)
General Habitats:	Great Basin scrub, Subalpine coniferous forest
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	2B.3
Global Rank:	G5
State Rank:	S2
State List:	None
Fed List:	None
Other Status:
CRPR Changes:	changed from 2.3 to 2B.3 on 2013-06-12

Occurrence Data from the CNDDB


Total Occurrences:	14
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	14

Location


California Endemic: False
California Counties and Islands: Name (Code)
Inyo (INY), Mono (MNO)
Quads: Name (Quad Code)
Blanco Mtn. (3711842), Boundary Peak (3711873), Chalfant Valley (3711853), Cirque Peak (3611842), Juniper Mtn. (3711862), Mt. Barcroft (3711852), White Mtn. Peak (3711863)

Threat List Data from the CNDDB


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

Notes



Endangered in OR, and state-listed as Sensitive in WA.
Threats:

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 21 November 2025].