Species Details

Neostapfia colusana

Colusa grass

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Lifeform: annual herb
Blooming Period: May-Aug
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Elevation:
5 - 200 meters
15 - 655 feet
General Habitats:
  • Vernal pools (adobe clay)
Microhabitat Details:
Microhabitat:
Notes:
Threatened by agriculture, development, overgrazing, hydrological alterations, 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.
Threats:
Taxonomy:
Threat List Total: 16
Total EOs % of EOs
EOs with Threat Listed: 63 95 %
THREAT LIST:
Grazing 54 81%
Agriculture 24 36%
Non-native plant impacts 16 24%
Foot traffic/trampling 10 15%
Altered flood/tidal/hydrologic regime 9 13%
Total Occurrences: 66
Element Occurrence Ranks:
A B C D X U
3 13 21 3 21 5
Occurrence Status:
Historical >20 Years 38
Recent <=20 Years 28
Presence:
Presumed Extant 45
Possibly Extirpated 7
Presumed Extirpated 14
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Colusa (COL)*, Glenn (GLE), Merced (MER), Solano (SOL), Stanislaus (STA), Yolo (YOL)
Quads: Name (Quad Code)
Arena (3712036), Atwater (3712035), Bachelor Valley (3712087), Cooperstown (3712065), Dozier (3812137), El Nido (3712024)*, Haystack Mtn. (3712043), Knights Ferry (3712076), Logandale (3912242), Merced (3712034), Montpelier (3712056), Owens Reservoir (3712032), Paulsell (3712066), Planada (3712033), Princeton (3912241)*, Sandy Mush (3712025), Saxon (3812146), Turlock Lake (3712055), Turner Ranch (3712026), Waterford (3712067)*, Yosemite Lake (3712044)
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.
Presumed Extant
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