Taxon  Report   2955 
Emex spinosa  (L.) Campd.
Devil's thorn,  Spiny threecornerjack
Emex spinosa
© 2008 Larry Sward
Click on a photo to see it bigger.
Emex spinosa
© 2008 Larry Sward
Emex spinosa, a dicot, is an annual herb that is not native to California; it was introduced from elsewhere and naturalized in the wild. Cal-IPC rating: Moderate

Emex spinosa is classified by the U.S. Federal Government as a NOXIOUS WEED. [USDA 2000]

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
Emex spinosa
© 2008 Larry Sward
Genus: Emex
weed, characteristic of disturbed places
Habitat: disturbed
Name Status:
Accepted by TJM2 + PLANTS + JM93
Alternate Names:
(according to)

PLANTS: Rumex spinosus
More information about  Emex spinosa
Photos on CalPhotos / Google Images
Jepson eFlora

Records from the Consortium of California Herbaria

Original Publication citation (ITIS)


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: Mar 24, 2018).

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