Taxon  Report   4456 
Juncus dubius  Engelm.
Dubius rush,  Mariposa rush
Juncus dubius
© 2010 Aaron Arthur
Click on a photo to see it bigger.
Juncus dubius
© 2015 Keir Morse
Juncus dubius
© 2015 Keir Morse
Juncus dubius, a monocot, is a perennial grasslike herb that is native to California and is also found outside of California, but is confined to western North America.

Interactive Distribution Map

Observation Hotline
(observation details + photos)

point, line, or polygon

Plant Characteristics
and Associations
Juncus dubius
© 2015 Keir Morse
Genus: Juncus
Yellow Pine Forest, Red Fir Forest, Subalpine Forest, Chaparral, wetland-riparian
Wetlands:Usually occurs in wetlands, but occasionally found in non wetlands [U.S. Fish & Wildlife Service.]
Name Status:
Accepted by TJM2 + PLANTS + JM93
More information about  Juncus dubius
Jepson eFlora

Records from the Consortium of California Herbaria

Original Publication citation (ITIS)


Search the International Plants Names Index

Search (Flora of North America)

Search the Lady Bird Johnson Wildflower Center

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]. 2016. Berkeley, California: The Calflora Database [a non-profit organization].
Available:   (Accessed: Oct 26, 2016).

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