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Amphistemon is a genus of 2 species of flowering plants in the family Rubiaceae. It is described by Inge Groeninckx in 2010 based on a molecular analysis of the Hedyotis-Oldenlandia group. The genus name is based on the Greek 'amphi-' (=double or of two kinds) and 'stemon' (=stamen) referring to the dimorphic stamen position characteristic for this genus.
It is endemic to southwestern and western Madagascar and is found in dry spiny forest-thicket and coastal bushland.
Text excerpted from the Wikipedia article Amphistemon by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
