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
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
This plant is available commercially.
Landscaping information from Calscape
Photos on   /   Google Images
Jepson eFlora

Records from the Consortium of California Herbaria

ITIS Original Publication citation


Search the International Plants Names Index

Search (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]. 2019. Berkeley, California: The Calflora Database [a non-profit organization]. Available:   (Accessed: Jan 17, 2019).