The poinsettia (Euphorbia pulcherrima) was first collected by members of the Sessé & Moçiño expedition in Mexico, subsequently also by Humboldt & Bonpland and Schiede & Deppe. Living material sent by Karwinski to the Royal Botanic Garden in Schöneberg formed the basis of the validation of the name E. pulcherrima which is here typified. The other names related to this taxon are also typified. It is shown that E. poinsettii Raf. is a validly published alternative name, which predates E. pulcherrima, making conservation of the latter well established name necessary.
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Vol. 41 • No. 2