Taxon  Report   11922    
Petrophytum caespitosum  (Nutt.) Rydb.  ssp. caespitosum 
Rock spiraea
Petrophytum caespitosum ssp. caespitosum
© 2005 James M. Andre
Photos from
CalPhotos / Calflora
Petrophytum caespitosum ssp. caespitosum
© 2009 Steve Matson
Petrophytum caespitosum ssp. caespitosum
© 2012 Neal Kramer
Petrophytum caespitosum ssp. caespitosum, a dicot, is a shrub 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
Petrophytum caespitosum ssp. caespitosum
© 2009 Steve Matson
Name Status:
Accepted by JEF

PLANTS accepted name:
Petrophytum caespitosum var. caespitosum

Alternate Names:
ICPN: Petrophyton caespitosum ssp. caespitosum
ICPN: Petrophytum caespitosum var. caespitosum
More information about  Petrophytum caespitosum ssp. caespitosum
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


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 18, 2019).