Taxon Report

Carex viridula Michx. ssp. viridula

green yellow sedge

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Taxon Summary

Carex viridula ssp. viridula, commonly known as green yellow sedge, is a perennial herb in the Cyperaceae that is found in California and elsewhere. It occurs within Bogs and fens, Marshes and swamps (freshwater), and North Coast coniferous forest (mesic), growing at elevations from 0 to 1600 meters. Carex viridula ssp. viridula is ranked 2B.3, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Not very threatened in California.

Classification


Scientific Name:	Carex viridula Michx. ssp. viridula
Common Name:	green yellow sedge
Family:	Cyperaceae
Element Code:	PMCYP03EM5
USDA Plants Symbol:	CAVIV
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: (Jun)Jul-Sep(Nov)	(Jun)Jul-Sep(Nov)
Elevation:	0-1600 (0-5250)
General Habitats:	Bogs and fens, Marshes and swamps, North Coast coniferous forest
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	2B.3
Global Rank:	G5T5
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:	8
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	1
Poor (D)	0
None (X)	0
Unknown (U)	7

Location


California Endemic: False
California Counties and Islands: Name (Code)
Del Norte (DNT), Humboldt (HUM), Mendocino (MEN), Siskiyou (SIS), Tuolumne (TUO)
Quads: Name (Quad Code)
China Mtn. (4112245), Crescent City (4112472), Gasquet (4112378), Inglenook (3912357), Lake Eleanor (3711987), Rodgers Peak (4112421), Sister Rocks (4112462), Smith River (4112482), Trinidad (4112412)

Threat List Data from the CNDDB


Threat List Total:	2
EOs with Threat Listed:	Total EOs	% of EOs
	1	13 %
Altered flood/tidal/hydrologic regime	1	12%
Non-native plant impacts	1	12%

Notes




Threats:

Taxonomy:

Selected References

Carex viridula ssp. viridula profile for potential Species of Conservation Concern evaluation (2018)

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 14 November 2025].