Gentianella weigendii (Gentianaceae), an Unusual New Gentian from Peru

Gentianella weigendii J. S. Pringle is described as a new species from Peru. It is distinctive among the South American species of Gentianella Moench (Gentianaceae) in its combination of green corollas scarcely longer than the calyces, stamens inserted at different levels on the corolla tube, and raised nectaries.