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Plant Database

Search for native plants by scientific name, common name or family. If you are not sure what you are looking for, try the Combination Search or our Recommended Species lists.

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Achnatherum diegoense

Achnatherum diegoense (Swallen) Barkworth

San Diego County Needle Grass, San Diego Needlegrass

Poaceae (Grass family)

Synonym(s): Stipa diegoensis

USDA Symbol: ACDI10

USDA Native Status: L48 (N)


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Plant Characteristics

Duration: Perennial
Habit: Grass/Grass-like
Fruit Type: Caryopsis
Size Notes: Up to about 5 feet tall.

Bloom Information

Bloom Color: Green , Brown
Bloom Time: Feb , Mar , Apr , May , Jun


Native Habitat: Chaparral and coastal sage scrub, and on rocky soils near streams or the coast.

National Wetland Indicator Status

Status: FACW
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

Web Reference

Webref 30 - Calflora (2018) Calflora
Webref 32 - Grasses of Canada, the U.S., and Mexico - North America north of Mexico (all countries, provinces, states, territories) (2019) Open Herbarium (

Additional resources

USDA: Find Achnatherum diegoense in USDA Plants
FNA: Find Achnatherum diegoense in the Flora of North America (if available)
Google: Search Google for Achnatherum diegoense


Record Modified: 0000-00-00
Research By: CBR

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