Calflora
Taxon  Report   4068    
Hemizonia congesta  DC.  ssp. congesta 
Hayfield tarweed
Hemizonia congesta ssp. congesta
© 2001 Doreen L. Smith
Photos from
CalPhotos / Calflora
Hemizonia congesta ssp. congesta
© 2015 John Doyen
Hemizonia congesta ssp. congesta
© 2015 Vernon Smith
Hemizonia congesta ssp. congesta, a dicot, is an annual herb that is native to California, is endemic (limited) to California.
CNPS Rare Plant Rank: 1B.2 (rare, threatened, or endangered in CA and elsewhere).   8th Edition

Interactive Distribution Map


Observation Hotline
(observation details)



point, line, or polygon

one or more occurrences
within a 7.5-minute quadrangle

Plant Characteristics
and Associations



Bloom Period
Hemizonia congesta ssp. congesta
© 2011 Zoya Akulova
Family: ASTERACEAE  
Genus: Hemizonia
Parent: Hemizonia congesta
Communities: Northern Coastal Scrub, Valley Grassland

Serpentine affinity: 1.3; (weak indicator / indifferent)

Name Status:
Accepted by JEF + CNPS + PLANTS

Alternate Names:
PLANTS: Hemizonia lutescens
PLANTS: Hemizonia luzulifolia var. lutescens
PLANTS: Hemizonia multicaulis
. . .
More information about  Hemizonia congesta ssp. congesta
Nursery / seed vendor availability from CNPLX
This plant is available commercially.
Landscaping information from Calscape
Photos on PlantID.net   /   Google Images
Jepson eFlora

Records from the Consortium of California Herbaria

ITIS Original Publication citation

USDA PLANTS Profile (HECOC2)

Search the International Plants Names Index

Search efloras.org (Flora of North America)

website references from Google


Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria. [web application]. 2019. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: Jan 18, 2019).