Taxon  Report   4097    
Hemizonia pungens  (Hook. & Arn.) Torr. & A. Gray  ssp. laevis  D. D. Keck  
(no longer an active name; please see Centromadia pungens ssp. laevis)
Common tarweed,  Smooth tarplant, Spikeweed
Hemizonia pungens ssp. laevis, a dicot, is an annual herb that is native to California and and is endemic (limited) to California.
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

Bloom Period
Genus: Hemizonia
Parent: Hemizonia pungens

Arid West: Equally likely to occur in wetlands and non wetlands
Mountains, Valleys and Coast: Occurs in non wetlands

Habitat: riparian, meadows, playas

Communities: Shadscale Scrub, Alkali Sink, Valley Grassland

Name Status:
Accepted in JM93

JEF + CNPS + PLANTS other name:
Centromadia pungens ssp. laevis

NOTE: Hemizonia pungens ssp. laevis is no longer an active name.
More information about  Hemizonia pungens ssp. laevis

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: Oct 28, 2020).