Taxon  Report   5462    
Micropus amphibolus  A. Gray
Mount diablo cottonseed,  Mt. diablo cottonweed
Micropus amphibolus
© 2008 Aaron Arthur
Photos from
CalPhotos / Calflora
Micropus amphibolus
© 2018 Lynn Overtree
Micropus amphibolus
© 2008 Aaron Arthur
Micropus amphibolus, a dicot, is an annual herb that is native to California, is endemic (limited) to California.
also called Stylocline amphibola
California Rare Plant Rank: 3.2 (review list).   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
Micropus amphibolus
© 2017 Tim Hyland
Genus: Micropus
Communities: Valley Grassland, Foothill Woodland, Mixed Evergreen Forest

Serpentine affinity: 2.4; (weak indicator)

Name Status:
Accepted by JEF + CNPS + PLANTS

Alternate Names:
PLANTS: Micropus amphibola
PLANTS: Stylocline amphiloba
CNPS + PLANTS: Stylocline amphibola
More information about  Micropus amphibolus
Nursery / seed vendor availability from CNPLX
Commercial availability unknown.
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 24, 2019).