Hemizonia congesta DC. ssp. congesta
Hayfield tarweed
2021 R.A. Chasey
2021 R.A. Chasey
2022 Hunter Breck
2019 Talila Golan
2021 R.A. Chasey
2019 Talila Golan
2022 Hunter Breck
2021 R.A. Chasey
2021 R.A. Chasey
Hemizonia congesta ssp. congesta is an
annual herb that is
native to California, and endemic (limited) to California.
California Rare Plant Rank: 1B.2 (rare, threatened, or endangered in CA and elsewhere ).
Siskiyou
Del Norte
Modoc
Humboldt
Shasta
Lassen
Trinity
Plumas
Tehama
Butte
Mendocino
Glenn
Sierra
Yuba
Lake
Nevada
Colusa
Placer
Sutter
El Dorado
Yolo
Alpine
Napa
Sonoma
Sacramento
Mono
Amador
Solano
Calaveras
Tuolumne
San Joaquin
Marin
Contra Costa
Alameda
Santa Cruz
Mariposa
Madera
San Francisco
San Mateo
Merced
Fresno
Stanislaus
Santa Clara
Inyo
San Benito
Tulare
Kings
Monterey
San Bernardino
San Luis Obispo
Kern
Santa Barbara
Ventura
Los Angeles
Riverside
Orange
San Diego
Imperial
one or more occurrences
Name Status : JEF + CNPS + PLANTS
Alternate Names:
JEF Hemizonia congesta ssp. leucocephala
JEF Hemizonia congesta ssp. vernalis
CNPS Hemizonia congesta, Hemizonia congesta ssp. leucocephala
PLANTS Hemizonia lutescens
PLANTS Hemizonia luzulifolia var. lutescens More …
Information about
Hemizonia congesta ssp. congesta
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2021 R.A. Chasey:!2021 R.A. Chasey:!2022 Hunter Breck:!2019 Talila Golan:!2021 R.A. Chasey:!2019 Talila Golan:!2022 Hunter Breck:!2021 R.A. Chasey:!2021 R.A. Chasey:!
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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: 07/15/2025).
one or more occurrences