1 | Leaves: biternate |
1' | Leaves: bipinnate |
1'' | Leaves: simple, unifoliolate, imparipinnate, digitate |
1''' | Leaves: paripinnate |
2 | Fruit: with stinging hairs (Fig. 1a) |
2' | Fruit: winged, with apical crest, or small sharp margin along lobes (Fig. 2) |
2'' | Fruit: warty, densely spiny, or densely scaled (Fig. 1b-j) |
2''' | Fruit: smooth or wrinkled, no stinging hairs, no wings |
3 | Seed: naked, placenta not thickened |
3' | Seed: with arillode and/or sarcotesta or placenta thickened |
4 | Indumentum: stellate or hairs in bundles, also simple hairs |
4' | Indumentum: only simple hairs or glabrous |
5 | Pseudo-stipules: present |
5' | Pseudo-stipules: absent |
6 | Wall of fruit inside: pilose, sometimes margin of valves only |
6' | Wall of fruit inside: glabrous |