Hitherto known only from the eastern sandstone area, this delicate species has now been collected in Cañon Grande on Cerro de la Neblina (Maguire, Wurdack, & Maguire 42234, 42517). The western population is distinguishable qualitatively only by the presence of a caducous short glandtipped apical seta on each petal. Quantitatively, the Neblina plants are generally more robust (the leaf blades up to 5 x 2 cm) with sparsely glandular-setulose peduncles and hypanthia; in all these characters, however, there is overlapping with the eastern population.