Taxon  Report   8001    
Tonestus eximius  (H. M. Hall) A. Nelson & J. F. Macbr.
Lake tahoe serpentweed,  Tahoe tonestus
Tonestus eximius
© 2003 Steve Matson
Photos from
CalPhotos / Calflora
Tonestus eximius
© 2011 Steven Perry
Tonestus eximius
© 2003 Steve Matson
Tonestus eximius, a dicot, is a perennial herb (rhizomatous) that is native to California, Nevada.
also called Haplopappus eximius
California Rare Plant Rank: 4.3 (limited distribution).   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
Tonestus eximius
© 2008 Steve Matson
Genus: Tonestus
Communities: Subalpine Forest
Name Status:
Accepted by JEF + CNPS + PLANTS

Alternate Names:
CNPS + PLANTS: Haplopappus eximius
More information about  Tonestus eximius
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 23, 2019).