Taxon  Report   3015    
Epilobium rigidum  Hausskn.
Siskiyou mtns. willowherb,  Stiff willowherb
Epilobium rigidum
© 2003 Norman Jensen
Photos from
CalPhotos / Calflora
Epilobium rigidum
© 2007 Norman Jensen
Epilobium rigidum
© 2005 Jennifer L. Kalt
Epilobium rigidum, a dicot, is a perennial herb that is native to California, Oregon.
CNPS Rare Plant Rank: 4.3 (limited distribution).   8th Edition

Interactive Distribution Map

Observation Hotline
(observation details + photos)

point, line, or polygon

one or more occurrences
within a 7.5-minute quadrangle

Plant Characteristics
and Associations

Bloom Period
Epilobium rigidum
© 2003 Norman Jensen
Genus: Epilobium
Communities: Yellow Pine Forest

Serpentine affinity: 5.1; (broad endemic)

Name Status:
Accepted by JEF + CNPS + PLANTS

Alternate Names:
PLANTS: Epilobium rigidum var. canescens
More information about  Epilobium rigidum
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]. 2018. Berkeley, California: The Calflora Database [a non-profit organization].
Available:   (Accessed: Nov 16, 2018).

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