Bruyns (P.R.O.Bally) 2006 - Bruyns PV, Mapaya RJ, Hedderson T (2006) A New Subgeneric Classification for Euphorbia (Euphorbiaceae) in Southern Africa Based on ITS and psbA-trnH Sequence Data. Taxon 55(2): 397-420. doi: 10.2307/25065587.
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Synonyms
Monadenium orobanchoides var. calycinum P.R.O.Bally