A new species, Alloplectus grandicalyx J. L. Clark & L. E. Skog, is described from northern Ecuador and southern Colombia. Alloplectus grandicalyx is differentiated from other similar species on the basis of larger calyx lobes, longer pedicels, and villous pubescence on the stems, leaves, petioles, and calyx lobes. A key is provided to help distinguish A. grandicalyx from other shrubby and resupinate flowered Alloplectus species. In addition, the commonly confused and widely spread Alloplectus tetragonoides Mansfeld is discussed and neotypified.
Novae Gesneriaceae Neotropicarum VIII: Alloplectus grandicalyx, a New Species from Colombia and Ecuador