Rumex hypogaeus

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Rumex hypogaeus
The seeds, most often almost black in colour
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Polygonaceae
Genus: Rumex
R. hypogaeus
Binomial name
Rumex hypogaeus
T.M.Schust. & Reveal

Rumex hypogaeus (synonym 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 - 'double thorned'), 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 2015-01-25. Retrieved 2014-10-17.

External links[edit]