Taxon Details

Orcuttia pilosa

hairy Orcutt grass

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Photo of Orcuttia pilosa
© 2003 George W. Hartwell
Photo of Orcuttia pilosa
© 2011 Chris Winchell
Photo of Orcuttia pilosa
© 2010 Chris Winchell

Taxon Summary:

Orcuttia pilosa, commonly known as hairy Orcutt grass, is a annual herb in the Poaceae that is found only in California. It occurs within Vernal pools, growing at elevations from 46 to 200 meters. Orcuttia pilosa is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Notes:
Seriously threatened by agriculture, urbanization, overgrazing, non-native plants, and trampling. See Bulletin of the Torrey Botanical Club 68:155 (1941) for original description, and American Journal of Botany 69:1082-1095 (1982) for taxonomic treatment.
Threats:
Taxonomy:
Threat List Total: 11
Total EOs % of EOs
EOs with Threat Listed: 31 86 %
THREAT LIST:
Agriculture 18 50%
Grazing 17 47%
Non-native plant impacts 9 25%
Disking 8 22%
Development 5 13%
Total Occurrences: 36
Element Occurrence Ranks:
A B C D X U
3 9 4 3 15 2
Occurrence Status:
Historical >20 Years 23
Recent <=20 Years 13
Presence:
Presumed Extant 21
Possibly Extirpated 7
Presumed Extirpated 8
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Glenn (GLE), Madera (MAD), Merced (MER), Stanislaus (STA), Tehama (TEH)
Quads: Name (Quad Code)
Cooperstown (3712065)*, Daulton (3711918), Gregg (3611988), Herndon (3611978), Kismet (3712011)*, Lanes Bridge (3611987), Logandale (3912242), Madera (3612081), Merced (3712034), Montpelier (3712056), Paulsell (3712066)*, Richardson Springs NW (3912188), Turlock Lake (3712055), Vina (3912281), 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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