| 1 | Lower surface of the lamina with hairs in the areoles |
| 1' | Lower surface of the lamina with hairs (almost) confined to the veins and veinlets or glabrous |
| 2 | Stipules 2-5 cm long; figs in the leaf axils, the receptacle 2-3.5 cm diam. when dry |
| 2' | Stipules 0.5-1.8 cm long; figs mostly below the leaves, the receptacle 0.5-1.8 cm diam. when dry |
| 3 | Lamina with dentate to denticulate margin, usually scabrous to scabridulous above, chartaceous to subcoriaceous |
| 3' | Lamina with entire (or crenate) margin, usually smooth above, (sub)coriaceous |
| 4 | Lamina mostly shorter than 10 cm and less than 5 cm wide; figs sessile |
| 4' | Lamina mostly longer than 10 cm and more than 5 cm wide; figs mostly pedunculate |
| 5 | Margin of the lamina dentate, denticulate or crenate |
| 5' | Margin of the lamina entire or subentire (sometimes sinuate to sublobate) |
| 6 | Stipules only ciliolate or, if hairy outside, then sparsely white puberulous on the keel; lamina 3-7-lobed to -fid also on fertile branches; fig receptacle usually (sub)pyriform and at least 1.5 cm diam. when dry; introduced, fruit tree |
| 6' | Stipules densely hairy or, if sparsely, then at least with some brownish stiff hairs on the keel or a tuft of hairs at the apex; lamina 3-7-lobed to -fid usually only on sterile branches; fig receptacle not pyriform or, if subpyriform, then less than 1.5 cm diam. when dry |
| 7 | Waxy glands in pairs, laterally at the base of the petiole |
| 7' | Waxy glands lacking at the base of the petiole, or if present, then inconspicuously and median at the base of the petiole |
| 8 | Stipules 0.4-0.8 cm long, usually brown hairy; fig receptacle 0.7-1 cm diam. when dry |
| 8' | Stipules 0.8-3.2 cm long, usually whitish to yellowish hairy; fig receptacle 1-1.6 (-2) cm diam. when dry |
| 9 | Stipules up to 1 cm long and/or petioles 1-4 cm long |
| 9' | Stipules mostly longer than 1 cm and/or petioles mostly longer than 4 cm |
| 10 | Lamina smooth above |
| 10' | Lamina scabrous to scabridulous above |
| 11 | Lamina cordiform to ovate in outline, base (sub)cordate |
| 11' | Lamina elliptic to oblong to (sub)obovate to pandurate in outline |
| 12 | Stipules with stiff hairs only on the keel |
| 12' | Stipules with the same type of hairs covering the whole surface |
| 13 | Basal lateral veins up to 1/3 the length of the lamina; stipules yellowish sericeous 18c |
| 13' | Basal lateral veins up to 1/3-2/3 the length of the lamina; stipules whitish to yellowish or brownish sericeous or strigose |
| 14 | Stipules whitish to yellowish sericeous; basal lateral veins branched |
| 14' | Stipules brown sericeous or strigose; basal lateral veins usually unbranched |
| 15 | Stipules only ciliolate, with a tuft of hairs at the apex or entirely glabrous |
| 15' | Stipules hairy outside, at least on the keel |
| 16 | Stipules with a small tuft of hairs at the apex |
| 16' | Stipules without a tuft of hairs at the apex |
| 17 | Epidermis of the petiole persistent |
| 17' | Epidermis of the petiole flaking off |
| 18 | Lamina hairy and the reticulum prominent beneath, the midrib not furcate |
| 18' | Lamina (almost) glabrous and the reticulum flat beneath, the midrib often not reaching the apex of the lamina |
| 19 | Waxy glandular spots in pairs at the base of the petiole |
| 19' | Waxy glandular spots absent at the base of the petiole |
| 20 | Indumentum of leafy twigs brown(ish) |
| 20' | Indumentum of the leafy twigs whitish or yellowish, often sparse |
| 21 | Lateral veins (7-)10-13(-18) pairs, the basal lateral veins hardly or not different from the other lateral veins |
| 21' | Lateral veins 4-8(-9) pairs, the basal lateral veins ± clearly different from the other lateral veins |
