| 1 | Pinnae with two narrow wings in the distal part, wings 0.5-2 mm wide. Calyx c. 12 mm long, narrowly campanulate, inflated at the mouth |
| 1' | Pinnae unwinged |
| 2 | Glands bowl-shaped. Principal lateral veins 4 or 5 per leaflet-half, very oblique. Inflorescence consisting of short unbranched racemes. Calyx 20-32 mm long, narrowly campanulate, inflated |
| 2' | Glands circular or subcircular with strongly raised, thick margins. Principal lateral veins 6-9 per leaflet-half, slightly oblique. Inflorescence consisting of a short, sturdy panicle, branched from the base. Calyx 8-20 mm long, tubular, but in the female specimens inflated at the mouth |
