| 1 | Hypocarp discoid, wider than long. |
| 1' | Hypocarp obconical or pulvinate, stalk-like, longer than wide, or ± equal in length and width. |
| 2 | Fruits subglobose, rounded at the apex; sparsely puberulous, glabrescent. Leaf veins reticulate, some cross-bar-like |
| 2' | Fruits broadly obovoid, concave at the apex; velutinous, sometimes glabrescent. Leaf veins reticulate-scalariform |
| 3 | Papillae on the lower leaf surface indistinct or obscure. Fruits 1-2½ by 1-2 cm, glabrous |
| 3' | Papillae on the lower leaf surface distinct. |
| 4 | Leaves glabrous, sometimes sparsely puberulous or pubescent on the lower surface; papillae in small groups in the areolae. Fruits 3-4 by 2-3½ cm, velutinous, glabrescent. |
| 4' | Leaves densely, sometimes sparsely tomentose or pubescent, glabrescent, rarely glabrous on the lower surface; papillae rather uniform, not separated into small groups as above. Fruits smaller, 1-1¼ by ¾-l cm, sparsely hairy, glabrescent |
