| 1 | Monoecious. Inflorescences few-flowered. Plant delicate. — Papua New Guinea; subalpine; 2500-3200 m altitude |
| 1' | Dioecious. Inflorescences many-flowered. Plant stouter |
| 2 | Styles 5. — Eastern Papua New Guinea; montane; 1000-2500 m altitude |
| 2' | Styles (2 or) 3. — Widespread, lowland and montane areas; in New Guinea 200-1000(-1800) m altitude |
