Xyris nigricans L.A.Nilsson, Kongl. Svenska Vetenskap.-Akad. Handl. 24(14): 60. 1892.

Wanderley, Maria das Gracas Lapa, 2017, Typification of binomials in Xyris section Nematopus (Xyridaceae) published by L. A. Nilsson, PhytoKeys 80, pp. 65-76 : 70

9. Xyris nigricans L.A.Nilsson, Kongl. Svenska Vetenskap.-Akad. Handl. 24(14): 60. 1892.

Type.

“Brasilien”.

We examined two syntype collections of X. nigricans . Both are of good quality: 1) Glaziou 15513, has two sheets at P (P00752388; P00752436), one at K (K000587098) and one at BR (BR000000694390); 2) Sellow s.n. has a single sheet at B (B 10 0242237). The lectotype is confirmed as sheet P00752388 of the Glaziou 15513 collection, previously indicated by Smith and Downs (1968) as the “type”. The label data of the lectotype states that it was collected in the state of Minas Gerais, at Alto de Itacolomy ("Haut Itacolomy"). The other three sheets at P (P 00752436), BR (BR000000694390) and K (K000587098) are thus isolectotypes. Although the species is endemic to Minas Gerais, equivocal information is given on the labels of the isolectotypes at K and BR, referring to the surroundings from Rio de Janeiro and Ouro Preto. However, there is no doubt that all of them are duplicates and part of the same collection Glaziou 15513, and each sheet was probably labelled by Glaziou. The exsiccate Sellow s.n., deposited at B (B 10 0242237), is a syntype of Xyris nigricans and is compatible with the protologue .