Taxon  Report   266    
Alternanthera philoxeroides  (Mart.) Griseb.
Alligator weed,  Alligatorweed
Alternanthera philoxeroides
© 2001 CDFA
Photos from
CalPhotos / Calflora
Alternanthera philoxeroides
© 2001 CDFA
Alternanthera philoxeroides
© 2001 CDFA
Alternanthera philoxeroides, a dicot, is a perennial herb that is not native to California; it was introduced from elsewhere and naturalized in the wild. Cal-IPC rating: High

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
Alternanthera philoxeroides
© 2001 CDFA
Genus: Alternanthera
Communities: wetland-riparian

Wetlands: Occurs in wetlands

Name Status:
Accepted by JEF + PLANTS

Alternate Names:
PLANTS: Achyranthes philoxeroides
More information about  Alternanthera philoxeroides
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 18, 2019).