CNPS Inventory Plant Detail

Neostapfia colusana

Common Name:	Colusa grass
Family:	Poaceae
Synonyms:
Element Code:	PMPOA4C010
Full Name:	Neostapfia colusana (Davy) Davy
USDA PLANTS Symbol:	NECO2

Biology
Lifeform: annual herb Blooming Period: May - August Habitat: • Vernal pools (adobe, large)

Rarity Status
CA Rare Plant Rank: 1B.1 Rare, threatened, or endangered in California and elsewhere .1: Seriously endangered in California Federal Listing Status: FT Threatened (03/26/97) State Listing Status: CE Endangered (11/79) State Rank: S2 S2: Imperiled. Global Rank: G2 G2: Imperiled.

Occurrence Data from DFG
California Natural Diversity Database

Total # of Known Element Occurrences: 59
Element Occurrence Ranks:

A B C D X U

2 23 13 1 17 3

Population Status:

Historic >20 yrs	Recent <=20 yrs
35	24

Presence:

Present Extant	Possibly Extirpated	Extirpated
42	7	10

Notes

Threatened by agriculture, development, overgrazing, flood control, non-native plants, and habitat fragmentation and loss. See Erythea 6:110-113 (1898) for original description, Fremontia 4(3):22-23 (1976) for species account and habitat information, and Conservation Genetics (2011) pp. 1-14 for population genetic information.
To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page.
Date Added: 1974-01-01
Last Update: 2011-12-06

Location

Elevation: 5 - 200 meters

California Endemic: yes

States: California

California Counties and Islands: name (code)
Colusa (COL) *, Glenn (GLE), Merced (MER), Solano (SOL), Stanislaus (STA), Yolo (YOL)

Quads: name (DWR code) USGS code
El Nido (401B)* 37120B4, Sandy Mush (402A) 37120B5, Turner Ranch (402B) 37120B6, Owens Reservoir (420C) 37120C2, Haystack Mtn. (421A) 37120D3, Yosemite Lake (421B) 37120D4, Merced (421C) 37120C4, Planada (421D) 37120C3, Arena (422C) 37120C6, Atwater (422D) 37120C5, Cooperstown (441A) 37120F5, Paulsell (441B) 37120F6, Montpelier (441C) 37120E6, Turlock Lake (441D) 37120E5, Waterford (442A)* 37120F7, Knights Ferry (459C) 37120G6, Bachelor Valley (460A) 37120H7, Antioch North (481D) 38121A7, Saxon (497B) 38121D6, Dozier (498D) 38121C7, Princeton (562A)* 39122D1, Logandale (562B) 39122D2

Notes:

Definitions of codes preceding a county and/or quad:
*		Presumed extirpated
?		Uncertain about distribution or identity
?*		Uncertain about distribution, but presumed extirpated if once present
(?)		Occurrence confirmed, but possibly extirpated

Species may be present in other areas where conditions are favorable.

Presumed Extant

Presumed Extirpated or Unknown

1174

Links to Leading Resources of Taxon Information
USDA PLANTS Calflora CalPhotos Consortium of California Herbaria California Department of Fish and Game: CNDDB Quick Viewer

Suggested Citation
California Native Plant Society (CNPS). Inventory of Rare and Endangered Plants (online edition, v8-01a). California Native Plant Society. Sacramento, CA. Accessed on .

-120.75,37.625