1	Sparse pubescence throughout the plant, on the leaves confined to the veins and margins only, leaves glabrescent with age; style pubescent along its entire length	D.galilensis
–	Dense pubescence throughout the plant, on the leaves extending to the blade mesophyll, leaves persistently pubescent with age; style glabrous or with only a few trichomes at the very base	2
2	Anthers included within the corolla tube; corolla pale purple or purplish-cream; style with a few trichomes at the base	D.epifita
–	Anthers partially to entirely exserted beyond the corolla tube; corolla yellowish-green, brownish-green or orange; style completely glabrous	3
3	Corolla tubular-campanulate, the tube yellowish-green with a conspicuous reticulum of purple veins on both surfaces; anthers completely exserted	D.huilensis
–	Corolla infundibuliform, the tube orange with a conspicuous reticulum of purple veins at the base on the adaxial side only; anthers partially included	D.lopezii