Taxon  Report   2324 
Conyza bonariensis  (L.) Cronq.  (not an active name; please see Erigeron bonariensis)
Horseweed,  South American horseweed, asthmaweed, flax leaved fleabane

Conyza bonariensis
© 2007 Luigi Rignanese
Conyza bonariensis, a dicot, is an annual herb that is not native to California; it was introduced from elsewhere and naturalized in the wild.

 Interactive Distribution Map 

 Observation Hotline 
 (observation details + photos)

point, line, or polygon

 Plant Characteristics
 and Associations

Bloom Period
Conyza bonariensis
© 2009 Neal Kramer
Genus: Conyza
Distribution by County 

Add an Observation of  Conyza bonariensis

Name Status:
Accepted by PLANTS + JM93
TJM2 accepted name: Erigeron bonariensis
Alternate Names:
(according to)

PLANTS: Erigeron bonariensis
PLANTS: Erigeron crispus
PLANTS: Erigeron linifolius
PLANTS: Leptilon bonariense
PLANTS: Leptilon linifolium
 NOTE: Conyza bonariensis is not an active name in the Calflora species table.
 Information about  Conyza bonariensis  from other sources:

Photos on CalPhotos / Google Images

website references on Google

UC Integrated Pest Management Weed Photo Gallery
(profile of this plant as an agricultural weed)

Records from the Consortium of California Herbaria

Original Publication citation. on the
International Plants Names Index

Search (Flora of North America)

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]. 2015. Berkeley, California: The Calflora Database [a non-profit organization].
Available:   (Accessed: Oct 03, 2015).

The information on this page comes from diverse sources. None of the links are sponsored.

News About Calflora Home
Calflora  -  1700 Shattuck Avenue   #198,   Berkeley, CA   94709  -  510 883-3148  -  CONTACT