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

Bloom Period
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
Nursery availability from CNPLX
Commercial availability unknown.
Jepson eFlora


Search (Flora of North America)

Landscape information from Calscape

Photos on   /   Google Images

Consortium of California Herbaria

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:   (Accessed: Dec 13, 2019).