| 1 | Spikelets c. 1 cm long. Leaves strongly circinnate towards the apex. Usually small plants |
| 1' | Spikelets 1.5-5.5 cm. Leaves not or less circinnate. Plants often larger. |
| 2 | Leaves flat (always in New Guinea), involute, convolute or conduplicate with acute, trigonous or triquetrous tip. |
| 2' | Leaves plano-convex with flat, or plano-convex blunt tip |
