Emex australis

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Emex australis
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Core eudicots
Order: Caryophyllales
Family: Polygonaceae
Genus: Emex
Species: E. australis
Binomial name
Emex australis

Emex australis, commonly known in English as southern threecornerjack,[1] devil's thorn,[citation needed] or double gee[2] (also doublegee, from the old Afrikaner name dubbeltge-doorn - 'devil's thorn'), or three-cornered jack, is a herbaceous plant of the Polygonaceae. It occurs indigenously in South Africa and is also an invasive species in Australia & Texas in the USA.


  1. ^ "Emex australis". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 18 January 2016. 
  2. ^ "BSBI List 2007". Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-02-25. Retrieved 2014-10-17. 

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