Taxon  Report   288 
Ambrosia acanthicarpa  Hook.
Annual burrweed,  Annual bursage, Annual burweed, Annual turweed
Ambrosia acanthicarpa
© 2003 Michelle Cloud-Hughes
More photos from
CalPhotos / Calflora
Ambrosia acanthicarpa
© 2003 Michelle Cloud-Hughes
Ambrosia acanthicarpa
© 2009 Steve Matson
Ambrosia acanthicarpa, a dicot, is an annual herb that is native to California and is also found elsewhere in North America and beyond.

Interactive Distribution Map

Observation Hotline
(observation details + photos)

point, line, or polygon

Plant Characteristics
and Associations

Bloom Period
Ambrosia acanthicarpa
© 2009 Neal Kramer
Genus: Ambrosia
Valley Grassland, Foothill Woodland, Coastal Sage Scrub
Distribution by County 

Add an Observation of  Ambrosia acanthicarpa

Name Status:
Accepted by JEF + PLANTS + JM93
Alternate Names:
(according to)

PLANTS: Franseria acanthicarpa
PLANTS: Gaertneria acanthicarpa
More information about  Ambrosia acanthicarpa
Nursery / seed vendor availability from CNPLX
This plant is available commercially.
Landscaping information from Calscape
Photos on CalPhotos / Google Images
Photos on

Jepson eFlora

Records from the Consortium of California Herbaria

ITIS Original Publication citation


Search the International Plants Names Index

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: Jul 19, 2018).

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