In the revision of Euphorbiaceae for the
Flora of Thailand (Chayamarit & Welzen, 2005;
Welzen & Chayamarit, 2007), two possibly undescribed
species of Croton L. from Thailand were
mentioned (Esser, 2005). For one of these (‘Croton
sp. 2’), several additional collections became available
recently. With data from these additional specimens
it is now obvious that indeed a new species
is present, which is described here.