Xyris obtusiuscula L.A.Nilsson, Kongl. Svenska Vetenskap.-Akad. Handl. 24(14): 47. 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

10. Xyris obtusiuscula L.A.Nilsson, Kongl. Svenska Vetenskap.-Akad. Handl. 24(14): 47. 1892.

Type.

“Brasilien”, Sellow s.n. ("in herb. Berol.") (holotype: B! [B10 0242234]).

Nilsson (1892) cited the Sellow s.n. collection in the protologue as at the Berlin herbarium (B). Smith and Downs (1968) indicated the B sheet as the type, but without specifying the type’s category. Considering that only this sheet of this collection is known at B (B10 0242234) and Nilsson’s citation of B in the protologue, we can confirm that it is the holotype. Although no mention was made in the protologue of Sellow’s collecting number, the label states that it is Sellow 1087. The holotype is a poor specimen, consisting of only one plant with two incomplete spikes, together with added fragments of the inflorescence, but nevertheless corresponds to the characteristics of the species.