Taxon  Report   2015    
Chorizanthe biloba  Goodman  var. immemora  Reveal & Hardham
San benito spineflower,  Twolobe spineflower
Chorizanthe biloba var. immemora
© 2013 Chris Winchell
Photos from
CalPhotos / Calflora
Chorizanthe biloba var. immemora
© 2011 Chris Winchell
Chorizanthe biloba var. immemora
© 1999 Dean Wm. Taylor
Chorizanthe biloba var. immemora, a dicot, is an annual herb that is native to California, is endemic (limited) to California.
California Rare Plant Rank: 1B.2 (rare, threatened, or endangered in CA and elsewhere).   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
Chorizanthe biloba var. immemora
© 2013 Chris Winchell
Communities: Chaparral, Foothill Woodland
Name Status:
Accepted by JEF + CNPS + PLANTS

More information about  Chorizanthe biloba var. immemora
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 22, 2019).