KEY TO THE SPECIES

1Inflorescence 12-15 cm long, verticillasters generally 0.5-1.5 cm apart. Upper corolla lip very unequally 3-lobed, the midlobe much broader than the lateral ones. Fruiting calyx thick-coriaceous, pitcher-shaped, inflated in the middle, 6.5-7 mm long
1'Inflorescence 6-8 cm long, verticillasters ± continuous. Upper corolla lip equally 3-lobed. Fruiting calyx herbaceous, tubular, not or only slightly inflated in the middle, 8-8.5 mm long