Hemipogon trilobatus sp. nov. (Apocynaceae: Asclepiadoideae), a new microendemic from Chapada dos Veadeiros, Central Brazil

Hemipogon trilobatus sp. nov. (Apocynaceae: Asclepiadoideae), a new microendemic from Chapada dos Veadeiros, Central Brazil

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Hemipogon s.str.(Apocynaceae: Asclepiadoideae) currently consists of three species sharing an erect herbaceous habit, narrow leaves and corona-less flowers with urceolate, internally bearded corolla, that are mainly distributed in savannahs of the Cerrado biodiversity hotspot, South America.Here, we describe and illustrate a new species of Hemipogon, H.

trilobatus Bitencourt & Rapini sp.nov., from an open savannah in Chapada dos Veadeiros, Protein Central Brazil.Hemipogon trilobatus sp.

nov.differs from the other species of the genus mainly by the presence of a reduced staminal corona with 3-lobed lobes, but also by opposite leaves and triangular anthers.Distribution and habitat data, as well STRAW as a key and a comparative table to distinguish the four species currently accepted in Hemipogon s.str.

, are provided.Based on criteria B2ab(i,ii,iii,iv) of the International Union for Conservation of Nature (IUCN), the species is provisionally assessed as Critically Endangered.