| 1 | Inflorescence a simple, unbranched raceme |
| 1' | Inflorescences consisting of pedunculate umbels or racemes aggregated into a synflorescence |
| 2 | Petiolules sparsely to densely puberulous; 2 or 3 very arched primary lateral veins per leaflet-half. Bracts subtending peduncles c. 0.5 mm long |
| 2' | Petiolules glabrous; primary lateral veins 5-9 per leaflet-half, erecto-patent. Bracts subtending lateral peduncles 2 mm long |
