Species Details

Alopecurus aequalis var. sonomensis

Sonoma alopecurus

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Photo of Alopecurus aequalis var. sonomensis

Classification

Scientific Name: Alopecurus aequalis Sobol. var. sonomensis Rubtzoff
Common Name: Sonoma alopecurus
Family:	Poaceae
Element Code:	PMPOA07012
USDA Plants Symbol:	ALAES
Synonyms/Other Names:

Conservation Status

CA Rare Plant Rank:	1B.1
Fed List:	FE (1997-10-22)
State List:	None
Global Rank:	G5T1
State Rank:	S1
Other Status:	SB_CalBG/RSABG
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2022-02-01

Ecology and Life History

Lifeform: perennial herb

Blooming Period: May-Jul

Elevation:
5 - 365 meters
15 - 1200 feet

General Habitats:

Marshes and swamps (freshwater)
Riparian scrub

Microhabitat Details:

Microhabitat:

Notes

Notes: Two occurrences introduced in 1987 (485C, 485D), but both appear to have failed as of 1993. Historical localities need field surveys. Threatened by cattle trampling, wetland habitat loss, and non-native plants. See A. aequalis in The Jepson Manual.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	6
	Total EOs	% of EOs
EOs with Threat Listed:	13	62 %
Grazing	10	47%
Other	5	23%
Foot traffic/trampling	3	14%
Non-native plant impacts	3	14%
Development	2	9%
Altered flood/tidal/hydrologic regime	1	4%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					21
A	B	C	D	X	U
0	3	2	3	6	7

Occurrence Status:
Historical >20 Years	15
Recent <=20 Years	6

Presence:
Presumed Extant	15
Possibly Extirpated	3
Presumed Extirpated	3

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Marin (MRN), Sonoma (SON)

Quads: Name (Quad Code)
Bolinas (3712286), Camp Meeker (3812248), Drakes Bay (3812218), Duncans Mills (3812341), Inverness (3812217), Kenwood (3812245), Sebastopol (3812247), Two Rock (3812237)

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 Rare Plant Inventory