Taxon  Report   5999    
Osmadenia tenella  Nutt.
False rosinweed,  Osmadenia
Osmadenia tenella
© 2015 Richard Spellenberg
Photos from
CalPhotos / Calflora
Osmadenia tenella
© 2015 Richard Spellenberg
Osmadenia tenella, a dicot, is an annual herb 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
Osmadenia tenella
© 2018 Diane Etchison
Genus: Osmadenia
Communities: Coastal Prairie, Southern Oak Woodland
Name Status:
Accepted by JEF + PLANTS

Alternate Names:
PLANTS: Hemizonia tenella
ICPN + PLANTS: Calycadenia tenella
More information about  Osmadenia tenella
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 23, 2019).