New species of Euphorbia (Euphorbiaceae) from eastern Ethiopia

Summary: The new species Euphorbia suborbicularis Thulin, E. kabridarensis Thulin, E. piceoides Thulin and E. michaelii Thulin, from the Somali National Regional State (Ogaden) of Ethiopia, are described and illustrated. E. suborbicularis is probably related to the eastern African E. polyantha, E. kabridarensis is obviously a close relative of E. intricata in south-eastern Ethiopia, southern Somalia and north-eastern Kenya, E. piceoides is close to E. adjurana in southern Ethiopia and northern Kenya, whereas E. michaelii is apparently related to E. xylacantha from northern Somalia and adjacent parts of Ethiopia. © The Board of Trustees of the Royal Botanic Gardens, Kew, 2009.