Hemizonia congesta Calflora

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Taxon Report

Hemizonia congesta DC.

Hayfield tarweed

Hemizonia congesta is an annual herb that is native to California, and also found elsewhere in western North America.


	Plant Range Observation Search ~2430 records in California Plant Characteristics

Bloom Period

Photos on Calflora


Subspecies and Varieties:
... ssp. calyculata ... ssp. clevelandii ... ssp. congesta ... ssp. lutescens ... ssp. luzulifolia ... ssp. tracyi
Genus:	Hemizonia
Family:	Asteraceae
Category:	angiosperm
PLANTS group:	Dicot
Jepson eFlora section: eudicot

Communities: Northern Coastal Scrub, Southern Oak Woodland, Foothill Woodland, Valley Grassland

Name Status:
Accepted by JEF + PLANTS

Information about Hemizonia congesta from other sources


Nursery availability from CNPLX This plant is available commercially. Jepson eFlora USDA PLANTS Profile (HECO7) 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 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: 03/29/2025).