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Stipa occidentalis  Thurb. ex S. Watson
Western needlegrass
© 2022 Steve Matson
© 2022 Steve Matson
© 2022 Arlee Montalvo
© 2018 David popp
© 2022 Arlee Montalvo
© 2021 Phyllis Fitzsimons
© 2020 David popp
Stipa occidentalis is a perennial grasslike herb that is native to California.
Siskiyou Del Norte Modoc Humboldt Shasta Lassen Trinity Plumas Tehama Butte Mendocino Glenn Sierra Yuba Lake Nevada Colusa Placer Sutter El Dorado Yolo Alpine Napa Sonoma Sacramento Mono Amador Solano Calaveras Tuolumne San Joaquin Marin Contra Costa Alameda Santa Cruz Mariposa Madera San Francisco San Mateo Merced Fresno Stanislaus Santa Clara Inyo San Benito Tulare Kings Monterey San Bernardino San Luis Obispo Kern Santa Barbara Ventura Los Angeles Riverside Orange San Diego Imperial
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Bloom Period
Subspecies and Varieties:
Genus: Stipa
Family: Poaceae  
Category: angiosperm  
PLANTS group:Monocot
Jepson eFlora section: monocot

Name Status:
Accepted by JEF
Alternate Names:
OTHERAchnatherum occidentalis
iNatEriocoma occidentalis var. pubescens
PLANTSAchnatherum occidentale ssp. occidentale
POWOEriocoma occidentalis
Information about  Stipa occidentalis from other sources
Nursery availability from CNPLX
This plant is available commercially.
Jepson eFlora

USDA PLANTS Profile (ACOCO)

Photos on Calflora

Photos on CalPhotos

Google Images

Photos on iNaturalist

ID Tips on PlantID.net


Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals. [web application]. 2025. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 03/28/2025).