1 | Fruits indehiscent |
1' | Fruits dehiscent |
2 | Fruit a woody or fleshy drupe, spherical to ellipsoid |
2' | Fruit variously winged or enclosed within the calyx lobes, not a drupe |
3 | Leaves always simple |
3' | Leaves trifoliolate or pinnate |
4 | Fruit outwardly little different from flowers, the calyx lobes scarcely enlarged and not or only slightly spreading, the styles long and protruding |
4' | Fruit markedly different from flowers, the wings well developed |
5 | Fruit a samara, the carpel wall laterally extended into 3 chartaceous wings with distinct reticulate venation |
5' | Fruit a pseudosamara, the ovary little enlarged from the flowering stage, supported by 4 considerably enlarged, spreading woody sepals |
6 | Leaves verticillate |
6' | Leaves opposite and decussate |
7 | Carpels 2; seeds hairy, not winged |
7' | Carpels 2-6; seeds glabrous, winged |
8 | Indumentum including stellate hairs and often spherical glandular trichomes that dry orange. Valves of capsule sometimes joined by a replum after dehiscence. |
8' | Indumentum of simple hairs only and lacking spherical orange glandular trichomes. Valves of capsule not joined by a replum after dehiscence |
9 | Fruit simple; carpels always 2 and seeds up to 40 per locule (New Guinea and New Britain) |
9' | Fruit multiple; carpels 2-5 and seeds 1 to few per locule (New Britain and New Ireland) |