Key to Varieties of Pogonopus speciosus

1. Corollas externally densely hirsutulous, with flared tubes 3-4 mm in diameter at base and 5-7 mm in diameter at top, with lobes 4-6.5 mm long; fruits 6-7 mm long; plants found in northern Colombia......var. sandwithianus

1'. Corollas externally densely puberulous, with flared tubes 2.5-3.5 mm in diameter at base and 4-6 mm in diameter at top, wiht lobes 3-4.2 mm long; capsules 7-8 mm long; plants found in northern Venezuela.....var. speciosus