| 1 | Leaves digitately compound. |
| 1' | Leaves palmately lobed. |
| 2 | Petiolules connected by a web of tissue for most of their length |
| 2' | Petioles free. Continental SE. Asia |
| 3 | Inflorescence branches and petioles densely covered with long red setae. |
| 3' | Inflorescence branches not as above (but sometimes setulose, furfuraceous, pubescent or glabrous). |
| 4 | Flowers sessile or subsessile |
| 4' | Flowers pedicelled. |
| 5 | Ovary c. 14-celled, pedicels stout, c. 4 mm ø |
| 5' | Ovary c. 8-10-celled, pedicels more slender, 1-2 mm ø |
