Calflora
Taxon  Report   9509    
Laennecia coulteri  (A. Gray) G. L. Nesom
Coulter's horseweed
Laennecia coulteri, a dicot, is an annual herb that is native to California, is also found outside of California, but is confined to western North America.
also called Conyza coulteri
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
Family: ASTERACEAE  
Genus: Laennecia

Wetlands: Equally likely to occur in wetlands and non wetlands

Communities: Valley Grassland, Foothill Woodland, Coastal Sage Scrub, Creosote Bush Scrub, wetland-riparian

Name Status:
Accepted by JEF + PLANTS

 Alternate Names:
JEF + PLANTS: Conyza coulteri
PLANTS: Conyza coulteri var. virgata
PLANTS: Eschenbachia coulteri
More information about  Laennecia coulteri
Search efloras.org (Flora of North America)

Landscape information from Calscape

Photos on PlantID.net   /   Google Images

Consortium of California Herbaria 2

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]. 2021. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: Jan 16, 2021).