Calflora
Taxon  Report   3018    
Epilobium siskiyouense  (Munz) Hoch & P. H. Raven
Siskiyou fireweed,  Siskiyou willowherb
Epilobium siskiyouense
© 2019 Julie Kierstead Nelson
Photos from
CalPhotos / Calflora
Epilobium siskiyouense
© 2011 Jason Reilly
Epilobium siskiyouense
© 2011 Jason Reilly
Epilobium siskiyouense, a dicot, is a perennial herb that is native to California, Oregon.
California Rare Plant Rank: 1B.3 (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
Epilobium siskiyouense
© 2019 Julie Kierstead Nelson
Family: ONAGRACEAE  
Genus: Epilobium
Communities: Lodgepole Forest, Subalpine Forest, Red Fir Forest, wetland-riparian

Wetlands: Occurs usually in wetlands, occasionally in non wetlands

Serpentine affinity: 5.5; (strict endemic)

Name Status:
Accepted by JEF + CNPS + PLANTS

Alternate Names:
ICPN + PLANTS: Epilobium obcordatum ssp. siskiyouense
ICPN + PLANTS: Epilobium obcordatum var. laxum
More information about  Epilobium siskiyouense
Nursery / seed vendor availability from CNPLX
Commercial availability unknown.
Landscaping information from Calscape
Photos on PlantID.net   /   Google Images
Jepson eFlora

Records from the Consortium of California Herbaria

ITIS Original Publication citation

USDA PLANTS Profile (EPSI2)

Search the International Plants Names Index

Search efloras.org (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: https://www.calflora.org/   (Accessed: Jan 21, 2019).