| 1 | Synandrium (0.3-)0.4-0.5 mm long, with (3 or) 4-6 anthers, androphore 0.3-0.6 mm long. Stigma broadly 2-lipped and minutely lobulate |
| 1' | Synandrium 0.2-0.3 mm long, with 2 or 3 anthers, androphore 0.7-1 mm. Stigma narrowly 2-lipped. [Perianth inside greenish to pale yellowish. Fruits 3-4.5 cm long.] |
| 2 | Plants either early glabrescent or leaf buds, inflorescences and flowers with greyish or pale brown hairs 0.1-0.2 mm long or less. Perianth inside greenish to yellowish (continental Southeast Asia, W Malesia, Philippines) or red (New Guinea). Fruits 2.5-4 cm long |
| 2' | Leaf buds, inflorescences and flowers with ± conspicuous rusty hairs 0.2-0.5 mm long. Perianth inside greenish yellow. Fruits 1.7-3.5 cm long |
