Taxon  Report   1328 
Calycadenia truncata  DC.
Rosin weed
Calycadenia truncata
© 2005 Steve Tyron
More photos from
CalPhotos / Calflora
Calycadenia truncata
© 2011 Aaron Arthur
Calycadenia truncata
© 2013 John Doyen
Calycadenia truncata, 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
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point, line, or polygon

Plant Characteristics
and Associations

Bloom Period
Calycadenia truncata
© 2011 Vernon Smith
Genus: Calycadenia
Foothill Woodland, Chaparral, Yellow Pine Forest
AFFINITY to serpentine soil:   2.1 (weak indicator)   [Safford et al 2005]
Distribution by County 

Add an Observation of  Calycadenia truncata

Name Status:
Accepted by JEF + PLANTS + JM93
Alternate Names:
(according to)

ICPN: Calycadenia truncata ssp. scabrella
ICPN: Calycadenia truncata ssp. truncata
More information about  Calycadenia truncata
Nursery / seed vendor availability from CNPLX
Commercial availability unknown.
Landscaping information from Calscape
Photos on CalPhotos / Google Images
Photos on

Jepson eFlora

Records from the Consortium of California Herbaria

ITIS Original Publication citation


Search the International Plants Names Index

Search (Flora of North America)

Search the Lady Bird Johnson Wildflower Center

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]. 2018. Berkeley, California: The Calflora Database [a non-profit organization].
Available:   (Accessed: Aug 18, 2018).

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