| 1 | Anthers short, elliptic to oblong in outline, not mucronate; lamina (of acrophylls) often slightly asymmetric, foveolate or tessellate beneath; stamens 1 (or 2) |
| 1' | Anthers long, lanceolate to oblong in outline, mucronate; lamina (of acrophylls) usually asymmetric, only in some species foveolate beneath; stamens 2 (or 3) |
| 2 | Waxy glands on the nodes of leafy twigs; leaves not clearly dimorphic (bathyphylls and acrophylls) |
| 2' | Waxy glands absent on the leafy twigs; leaves dimorphic (bathyphylls and acrophylls) |
| 3 | Staminate flowers scattered among the pistillate ones |
| 3' | Staminate flowers near the ostiole |
| 4 | Stamens free; figs axillary, solitary; hairs without swollen bases |
| 4' | Stamens basally connate; figs often clustered on short spurs (ramiflorous) or axillary and usually in pairs, hairs (all or some) with swollen bases |
