Calflora
Taxon  Report   10475    
Ambrosia monogyra  (Torr. & A. Gray) Strother & B. G. Baldwin
Singlewhorl burrobrush
Ambrosia monogyra
© 2014 Keir Morse
Photos from
CalPhotos / Calflora
Ambrosia monogyra
© 2017 Ron Vanderhoff
Ambrosia monogyra
© 2017 Ron Vanderhoff
Ambrosia monogyra, a dicot, is a shrub that is native to California, is also found outside of California, but is confined to western North America.
California Rare Plant Rank: 2B.2 (rare, threatened, or endangered in CA; common elsewhere).   8th Edition

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 monogyra
© 2017 Ron Vanderhoff
Family: ASTERACEAE  
Genus: Ambrosia
Communities: Chaparral

Wetlands: Occurs in non wetlands

Name Status:
Accepted by JEF + CNPS

PLANTS accepted name:
Hymenoclea monogyra

Alternate Names:
ICPN: Hymenoclea monogyra
More information about  Ambrosia monogyra
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

USDA PLANTS Profile (HYMO)

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]. 2019. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: Jan 23, 2019).