Species Details

Carex halliana

Oregon sedge

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Classification

Scientific Name: Carex halliana Bailey
Common Name: Oregon sedge
Family:	Cyperaceae
Element Code:	PMCYP035M0
USDA Plants Symbol:	CAHA2
Synonyms/Other Names:

Conservation Status

CA Rare Plant Rank:	2B.3
Fed List:	None
State List:	None
Global Rank:	G4G5
State Rank:	S2
Other Status:
CRPR Changes: changed from 2.3 to 2B.3 on 2013-06-12
Add Date:	1980-01-01
Date Edited:	2023-07-07

Ecology and Life History

Lifeform: perennial rhizomatous herb

Blooming Period: (May)Jul-Sep

Elevation:
1370 - 2105 meters
4495 - 6905 feet

General Habitats:

Meadows and seeps
Subalpine coniferous forest
Upper montane coniferous forest

Microhabitat Details: Often pumice

Microhabitat:

Notes

Notes:
Threats: Possibly threatened by fire suppression, recreational activities, vehicles, and logging.
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	8
	Total EOs	% of EOs
EOs with Threat Listed:	12	71 %
Other	5	29%
Road/trail construction/maint.	4	23%
Logging	3	17%
ORV activity	2	11%
Foot traffic/trampling	1	5%
Improper burning regime	1	5%
Wood cutting or brush clearing	1	5%
Recreational use (non-ORV)	1	5%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					17
A	B	C	D	X	U
5	7	1	0	0	4

Occurrence Status:
Historical >20 Years	10
Recent <=20 Years	7

Presence:
Presumed Extant	17
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

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

California Counties and Islands: Name (Code)
Modoc (MOD), Siskiyou (SIS), Trinity (TRI)

Quads: Name (Quad Code)
Ash Creek Butte (4112241), Bonita Butte (4112166), Border Mtn. (4112144), Medicine Lake (4112155), Scott Mountain (4112236), Somes Bar (4112344), Ukonom Mtn. (4112354), West of Kephart (4112154)

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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Selected References

Species Account:

Carex halliana profile for potential Species of Conservation Concern evaluation (2017)