Taxon Details

Stipa divaricata

small-flowered rice grass

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Taxon Summary:

Stipa divaricata, commonly known as small-flowered rice grass, is a perennial herb in the Poaceae that is found in California and elsewhere. It occurs within Pinyon and juniper woodland (gravelly, and carbonate), growing at elevations from 700 to 2950 meters. Stipa divaricata is ranked 2B.3, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Not very threatened in California.

Classification

Scientific Name: Stipa divaricata Columbus & J.P. Sm.
Common Name: small-flowered rice grass
Family:	Poaceae
Element Code:	PMPOA4J070
USDA Plants Symbol:
Synonyms/Other Names: Oryzopsis micrantha (Trin. & Rupr.) Thurb. Piptatherum micranthum
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	2B.3
Fed List:	None
State List:	None
Global Rank:	G5
State Rank:	S1S2
Other Status:
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2024-12-03

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Jun-Sep

Elevation:
700 - 2950 meters
2295 - 9680 feet

General Habitats:

Pinyon and juniper woodland (gravelly, carbonate)

Microhabitat Details:

Microhabitat:

Notes

Notes: Threatened in ID. See Phytologia 74(1):1-25 (1993) for revised nomenclature.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	0
	Total EOs	% of EOs
EOs with Threat Listed:	0	%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					7
A	B	C	D	X	U
1	0	0	0	0	6

Occurrence Status:
Historical >20 Years	7
Recent <=20 Years	0

Presence:
Presumed Extant	7
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
Arizona (AZ), California (CA), Colorado (CO), Idaho (ID), Montana (MT), Nebraska (NE), Nevada (NV), New Mexico (NM), North Dakota (ND), Oklahoma (OK), South Dakota (SD), Texas (TX), Utah (UT), Wyoming (WY)

California Counties and Islands: Name (Code)
Inyo (INY), Mono (MNO), San Bernardino (SBD)

Quads: Name (Quad Code)
Blanco Mtn. (3711842), Clark Mtn. (3511555), Kingston Peak (3511568), Mt. Barcroft (3711852), Station Peak (3711851)

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