Taxon Details

Carex klamathensis

Klamath sedge

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Taxon Summary:

Carex klamathensis, commonly known as Klamath sedge, is a perennial rhizomatous herb in the Cyperaceae that is found in California and elsewhere. It occurs within Chaparral, Cismontane woodland, and Meadows and seeps, growing at elevations from 1000 to 1140 meters. Carex klamathensis is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Carex klamathensis B.L. Wilson & Janeway
Common Name: Klamath sedge
Family:	Cyperaceae
Element Code:	PMCYP03L70
USDA Plants Symbol:	CAKL
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G2
State Rank:	S1
Other Status:	BLM_S; SB_UCSC
CRPR Changes: added to 1B.2 on 2008-03-20
Add Date:	2008-03-20
Date Edited:	2025-04-01

Ecology and Life History

Lifeform: perennial rhizomatous herb

Blooming Period:

Elevation:
1000 - 1140 meters
3280 - 3740 feet

General Habitats:

Chaparral
Cismontane woodland
Meadows and seeps

Microhabitat Details:

Microhabitat:

Serpentine

Notes

Notes: Not in The Jepson Manual (1993).
Threats: Threatened by mining, recreational activities, and vehicles.
Taxonomy:

Threat List Data from the CNDDB

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

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					3
A	B	C	D	X	U
0	0	0	0	0	3

Occurrence Status:
Historical >20 Years	3
Recent <=20 Years	0

Presence:
Presumed Extant	3
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA), Oregon (OR)

California Counties and Islands: Name (Code)
Colusa (COL), Lake (LAK), Tehama (TEH)

Quads: Name (Quad Code)
Hough Springs (3912225), Raglin Ridge (4012216)

Notes:

Definitions of codes following a county and/or quad:
*		Presumed extirpated
(?)		Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Regional Map

Map

Presumed Extant

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CNPS Status Review:	Proposed New Add to Rank 1B.2, G2 / S1.2 (2008)
Original Description:	J. Bot. Res. Inst. Texas 1(1): 69-77 (2007)
Species Account:	Carex klamathensis profile for potential Species of Conservation Concern evaluation (2018)

CNPS Rare Plant Inventory