Taxon Report

Orcuttia inaequalis Hoov.

San Joaquin Valley Orcutt grass

Print Report

Classification


Scientific Name:	Orcuttia inaequalis Hoov.
Common Name:	San Joaquin Valley Orcutt grass
Family:	Poaceae
Element Code:	PMPOA4G060
USDA Plants Symbol:	ORIN
Synonyms/Other Names:	Orcuttia californica (Hoov.) Hoov. var. inaequalis

Ecology and Life History


Lifeform:	annual herb
Blooming Period: Apr-Sep	Apr-Sep
Elevation:	10-755 (35-2475)
General Habitats:	Vernal pools
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.1
Global Rank:	G1
State Rank:	S1
State List:	CE
Fed List:	FT
Other Status:
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	47
Element Occurrence Ranks:
Excellent (A)	5
Good (B)	9
Fair (C)	8
Poor (D)	2
None (X)	17
Unknown (U)	6

Location


California Endemic: True
California Counties and Islands: Name (Code)
Fresno (FRE), Madera (MAD), Merced (MER), Solano (SOL), Stanislaus (STA)*, Tulare (TUL)
Quads: Name (Quad Code)
Cressey (3712046), Daulton (3711918), Denair (3712057), Elmira (3812138), Fresno North (3611977), Friant (3611986), Haystack Mtn. (3712043), Ivanhoe (3611942), Kismet (3712011), Lanes Bridge (3611987), Le Grand (3712022), Merced (3712034), Millerton Lake East (3711915), Monson (3611943), Montpelier (3712056), Orange Cove North (3611963), Owens Reservoir (3712032), Paulsell (3712066), Planada (3712033), Wahtoke (3611964), Waterford (3712067)*, Woodlake (3611941), Yosemite Lake (3712044)

Threat List Data from the CNDDB


Threat List Total:	14
EOs with Threat Listed:	Total EOs	% of EOs
	37	79 %
Grazing	23	48%
Non-native plant impacts	11	23%
Agriculture	10	21%
Development	9	19%
Altered flood/tidal/hydrologic regime	6	12%
Foot traffic/trampling	6	12%
ORV activity	4	8%
Other	3	6%
Disking	2	4%
Road/trail construction/maint.	2	4%
Vandalism/dumping/litter	1	2%
Erosion/runoff	1	2%
Dam/Inundation	1	2%
Recreational use (non-ORV)	1	2%

Notes



Seriously threatened by agriculture, development, overgrazing, channelization, and non-native plants. See Madroño 3(6):229 (1936) for original description, and American Journal of Botany 69:1082-1095 (1982) for taxonomic treatment.
Threats:

Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 6 January 2025].