Xyris glandacea L.A.Nilsson, Kongl. Svenska Vetenskap.-Akad. Handl. 24(14): 50. 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 : 68

4. Xyris glandacea L.A.Nilsson, Kongl. Svenska Vetenskap.-Akad. Handl. 24(14): 50. 1892.

Type.

“Brasilien”.

In his Xyris glandacea protologue, Nilsson (1892) cited the Regnell III 2065 collection, and indicated UPS as the herbarium where it was deposited. However, Smith and Downs (1968), apparently ignoring the holotype, made an improper designation, and chose the isotype at S as the lectotype. The present study confirmed the presence of the holotype at UPS ( Regnell III 2065), and that the duplicate housed at S is indeed the isotype. The holotype contains a short manuscript description that agrees with the species diagnosis. There is an attached envelope containing fragments of the inflorescence, confirming that it was used to describe the species. Both the holotype and isotype are compatible with the diagnosis and provide decisive confirmation of the rediscovery in the field of X. glandacea after a century, previously reported by Wanderley (2011). Due to earlier poor understanding of its identity, the name has been applied to various different species of Xyris in herbarium collections.