Two Taxonomic Innovations in South American Gentianella (Gentianaceae)

Gentianella undulatisepala J. S. Pringle, a new species from Bolivia, is described for the Gentianaceae. It is distinguished from other solitary-flowered species in La Paz Department by its long pedicels and the undulate margins of its calyx lobes. Gentianella arenarioides (Gilg) J. S. Pringle is restored to accepted taxonomic status, with the name neotypified, and the new nomenclatural combination is published.