Taxon  Report   226    
Allium platycaule  S. Watson
Broad stemmed onion,  Broadstemmed onion, Flat stemmed onion
Allium platycaule
© 2008 Neal Kramer
Photos from
CalPhotos / Calflora
Allium platycaule
© 2008 Neal Kramer
Allium platycaule
© 2003 Joseph Dougherty/
Allium platycaule, a monocot, is a perennial herb (bulb) that is native to California, is also found outside of California, but is confined to western North America.

Interactive Distribution Map

Observation Hotline
(observation details)

point, line, or polygon

Plant Characteristics
and Associations

Bloom Period
Allium platycaule
© 2006 Steve Matson
Genus: Allium
Communities: Sagebrush Scrub, Yellow Pine Forest, Red Fir Forest, Lodgepole Forest

Toxicity: MINOR

Habitat: slopes, ridges

Name Status:
Accepted by JEF + PLANTS

More information about  Allium platycaule
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 19, 2019).