Calflora
Taxon  Report   299    
Ambrosia pumila  (Nutt.) A. Gray
Ragweed,  San diego ambrosia, San diego ragweed
Ambrosia pumila
© 2010 Benjamin Smith
Photos from
CalPhotos / Calflora
Ambrosia pumila
© 2013 Keir Morse
Ambrosia pumila
© 2013 Keir Morse
Ambrosia pumila, a dicot, is a perennial herb (rhizomatous) that is native to California, Baja California.
CNPS Rare Plant Rank: 1B.1 (rare, threatened, or endangered in CA and elsewhere).   8th Edition

It is listed by the Federal Government as Endangered .

Interactive Distribution Map


Observation Hotline
(observation details)



point, line, or polygon

one or more occurrences
within a 7.5-minute quadrangle

Plant Characteristics
and Associations



Bloom Period
Ambrosia pumila
© 2005 Vince Scheidt
Family: ASTERACEAE  
Genus: Ambrosia
Communities: Chaparral, Valley Grassland, Coastal Sage Scrub, Freshwater Wetlands

Wetlands: Occurs usually in non wetlands, occasionally in wetlands

Habitat: vernal-pools, disturbed

Name Status:
Accepted by JEF + CNPS + PLANTS

Alternate Names:
PLANTS: Franseria pumila
More information about  Ambrosia pumila
Nursery / seed vendor availability from CNPLX
Commercial availability unknown.
Landscaping information from Calscape
Photos on PlantID.net   /   Google Images
Jepson eFlora

Records from the Consortium of California Herbaria

ITIS Original Publication citation

USDA PLANTS Profile (AMPU4)

Search the International Plants Names Index

Search efloras.org (Flora of North America)

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: https://www.calflora.org/   (Accessed: Dec 13, 2018).

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