Erioneuron pilosum Calflora

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Taxon Report

Erioneuron pilosum (Buckley) Nash

Hairy erioneuron, Hairy woollygrass

2020 Matt Berger

2011 Duncan S. Bell

2023 Dana York

2013 Justy Leppert

2006 James M. Andre

2015 Wynn Anderson

Erioneuron pilosum is a perennial grasslike herb that is native to California, and also found elsewhere in North America and beyond.

also called Tridens pilosus

California Rare Plant Rank: 2B.3 (rare, threatened, or endangered in CA; common elsewhere).


	Plant Range Observation Search ~69 records in California Plant Characteristics one or more occurrences within a 7.5-minute quadrangle

Bloom Period

Photos on Calflora


Genus:	Erioneuron
Family:	Poaceae
Category:	angiosperm
PLANTS group:	Monocot
Jepson eFlora section: monocot

Communities: Pinyon-Juniper Woodland

Name Status:
Accepted by JEF + CNPS + PLANTS + POWO

Alternate Names:


JEF + CNPS + PLANTS	Tridens pilosus
PLANTS	Uralepis pilosa

Information about Erioneuron pilosum from other sources


Nursery availability from CNPLX Commercial availability unknown. Jepson eFlora USDA PLANTS Profile (ERPI5) Photos on Calflora Photos on CalPhotos Google Images Photos on iNaturalist ID Tips on PlantID.net	ITIS Original Publication citation International Plants Names Index Search efloras.org (Flora of North America) Landscape information from Calscape BONAP Distribution Map CNPS Inventory: 2B.3 Consortium of California Herbaria 2 Search the Native American Ethnobotany Database	Add an Observation Location Suitability Planting Guide Distribution by County
photos / record / common / links

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: 05/23/2025).