Taxon  Report   9509 
Laennecia coulteri  (A. Gray) G.L. Nesom
Coulter's horseweed
Laennecia coulteri
© 2011 Neal Kramer
Click on a photo to see it bigger.
Laennecia coulteri
© 2012 Lynn Robertson
Laennecia coulteri
© 2015 Richard Spellenberg
Laennecia coulteri, a dicot, is an annual herb that is native to California and is also found outside of California, but is confined to western North America.

Interactive Distribution Map

Observation Hotline
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Plant Characteristics
and Associations

Bloom Period
Laennecia coulteri
© 2006 Adonis (Don) Tate
Genus: Laennecia
Valley Grassland, Foothill Woodland, Coastal Sage Scrub, Creosote Bush Scrub, wetland-riparian
Wetlands: Equally likely to occur in wetlands and non wetlands
Distribution by County 

Add an Observation of  Laennecia coulteri

Name Status:
Accepted by TJM2 + PLANTS
Alternate Names:
(according to)

PLANTS: Conyza coulteri var. virgata
PLANTS: Eschenbachia coulteri
TJM2 + PLANTS: Conyza coulteri
More information about  Laennecia coulteri
Nursery / seed vendor availability from CNPLX
Commercial availability unknown.
Landscaping information from Calscape
Photos on CalPhotos / Google Images

Jepson eFlora

Records from the Consortium of California Herbaria


Search (Flora of North America)

Search the Lady Bird Johnson Wildflower Center

website references from Google

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]. 2018. Berkeley, California: The Calflora Database [a non-profit organization].
Available:   (Accessed: Mar 22, 2018).

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