| 1 | Leaves more or less glaucous; lamina truncate or shortly cuneate at the base into a sharply defined dark coloured petiole more than 10 mm long; style articulate 0-0.5 mm above the base |
| 1' | Leaves not glaucous; lamina attenuate at the base into an obscure winged petiole less than 10 mm long; style articulate 2-3 mm above the base |
| 2 | Leaves mostly acuminate and acute at the apex, 12-20 cm long; inflorescence parts
robust; peduncles of the triads mostly 1-3 mm long |
| 2' | Leaves mostly rounded, rarely acute at the apex, 5-14 cm long; inflorescence parts slender; peduncles of the triads mostly 3-7 mm long |
