Typification of the name Juncus oxycarpus (Verojuncus oxycarpus) (Juncaceae) and its synonym, with nomenclatural notes

Abstract

The typification of the name Juncus oxycarpus (Verojuncus oxycarpus) and its synonym Juncus suboxycarpus (Juncaceae) is presented alongside nomenclatural notes addressing historical confusion in their classification. Juncus oxycarpus was described from South Africa using specimens collected by J.F. Drège and C.H. Bergius. Unfortunately, the original materials collected by Drège represent various similar Juncus species, which historically caused challenges in accurately identifying this taxon. Additionally, the syntype specimens of Drège and Bergius in B were destroyed during World War II. To resolve these issues and prevent possible further confusion, specimens from various herbaria worldwide were examined and lectotypes were designated for the name of this widely distributed African taxon and its synonym.