Taxon  Report   4068    
Hemizonia congesta  DC.  ssp. congesta 
Hayfield tarweed
Hemizonia congesta ssp. congesta, a dicot, is an annual herb that is native to California, and is endemic (limited) to California.
California Rare Plant Rank: 1B.2 (rare, threatened, or endangered in CA and elsewhere).   CNPS Inventory
Observation Search
(438 records)
one or more occurrences
within a 7.5-minute quadrangle

Bloom Period
Genus: Hemizonia
Parent: Hemizonia congesta
Serpentine affinity: 1.3; (weak indicator / indifferent)

Communities: Northern Coastal Scrub, Valley Grassland

Name Status:
Accepted by JEF + CNPS + PLANTS

JEF other name:
Hemizonia congesta ssp. lutescens

Alternate Names:
JEF + CNPS: Hemizonia congesta ssp. leucocephala
JEF: Hemizonia congesta ssp. vernalis
PLANTS: Hemizonia lutescens
. . .
More information about  Hemizonia congesta ssp. congesta
Nursery availability from CNPLX
This plant is available commercially.
Jepson eFlora


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]. 2020. Berkeley, California: The Calflora Database [a non-profit organization]. Available:   (Accessed: Jan 28, 2020).