Novae Gesneriaceae Neotropicarum IV: Alloplectus purpureus and Columnea nematoloba—New Gesneriaceae from northwestern South America

Two species of Gesneriaceae are described: Alloplectus purpureus from the lower montane forests of northwestern Ecuador and adjacent Colombia and Columnea nematoloba from the lowland rain forests of western Colombia. The first with its fimbriate calyx lobes is probably nearest to Alloplectus sprucei, occurring in the same region but mostly at lower elevations. The second is in a group with two recently described species from western Ecuador and Colombia, Columnea fililoba and C. incredibilis, all having filiform corolla lobes.