| 1 | Lower surface of the lamina foveolate with deep stomatal pits and the areoles surrounded by very prominent veinlets; the midrib of the lamina not reaching the apex; cultivated |
| 1' | Lower surface of the lamina not foveolate or, if foveolate, then the stomatal pits shallow, surrounded by slightly prominent to almost flat veinlets, often bearing short hairs ± covering the stomatal pits; indigenous |
| 2 | Lower surface of the lamina foveolate (the areoles surrounded by a rim) or tessellate (the areoles brownish when dry, usually surrounded by paler coloured tissue) |
| 2' | Lower surface of the lamina neither foveolate nor clearly tessellate |
| 3 | Basal lateral veins up to 1/10-1/8 the length of the lamina; petiole usually 1-4; stipules usually 1-2 cm long |
| 3' | Basal lateral veins up to 1/8-1/3 the length of the lamina; petiole usually up to 1 cm long and/or stipules up to 1 cm long |
| 4 | Lamina glabrous; fig receptacle subglobose and 0.7-1.5 cm diam. or 8-10 by 3-4.5 when dry |
| 4' | Lamina hairy on the veins beneath; fig receptacle subglobose to subpyriform and 2-3.5 cm diam. when dry |
| 5 | Acumen of the lamina shortly mucronate |
| 5' | Acumen (or apex) of the lamina minutely retuse |
| 6 | Basal lateral veins up to 1/4-1/3 the length of the lamina; figs axillary, the basal bracts 1.5-3 mm long |
| 6' | Basal lateral veins usually up to 1/4 the length of the lamina; figs also below the leaves on minute spurs, the basal bracts 0.5-15 mm long |
| 7 | Lamina glabrous |
| 7' | Lamina hairy, at least beneath, at least sparsely so on the midrib |
| 8 | Basal lateral branched; fig receptacle 1.2-2.5 cm diam. when dry |
| 8' | Basal lateral unbranched; fig receptacle 0.3-1 cm diam. when dry |
| 9 | Acumen of the lamina shortly mucronate; fig receptacle 0.3-0.4 cm diam. when dry |
| 9' | Acumen or apex of the lamina not mucronate; fig receptacle 0.6-1 cm diam. when dry |
| 10 | Basal bracts persistent |
| 10' | Basal bracts caducous |
| 11 | Tertiary venation scalariform; lamina usually or often longer than 10 cm, occasionally less than 5 cm long |
| 11' | Tertiary venation reticulate or to subscalariform (with few, ± irregular, transverse (and parallel) tertiary veins, in particular in relatively large leaves); lamina always or often less than 10 cm long, often less than 5 cm long and with 3-6 pairs of lateral veins, or, if usually longer than 10 cm |
| 12 | Basal bracts 1-2 mm long |
| 12' | Basal bracts 3-7(-10) cm long |
| 13 | Basal lateral veins up to c. 1/2(-2/3) the length of the lamina; lamina sparsely hairy beneath |
| 13' | Basal lateral veins 2/3-3/4 the length of the lamina; lamina densely hairy beneath |
| 14 | Figs (sub)sessile |
| 14' | Figs pedunculate |
| 15 | Epidermis of the petiole flaking off; lower surface of the lamina hairy on the main veins; fig receptacle globose to ovoid |
| 15' | Epidermis of the petiole persistent; lower surface of the lamina hairy also on the smaller veins; fig receptacle ellipsoid |
| 16 | Lamina sparsely puberulous to subtomentose beneath; basal bracts 1-2 mm long |
| 16' | Lamina densely floccose-tomentose beneath; basal bracts c. 3 mm long |
| 17 | Tertiary venation scalariform; lamina usually or often longer than 10 cm, occasionally less than 5 cm long |
| 17' | Tertiary venation reticulate or to subscalariform (with few, ± irregular, transverse (parallel) tertiary veins, in particular, in relatively large leaves; lamina always or often less than 10 cm long, often less than 5 cm long |
| 18 | Figs on spurs below the leaves (but already developing in the leaf axils), if the figs small, then often clustered, or if large, then often in pairs or solitary |
| 18' | Figs in pairs or solitary in the leaf axils or just below the leaves |
| 19 | Fig receptacle hairy; indumentum partly consisting of irritant hairs present |
| 19' | Fig receptacle glabrous; indumentum without irritant hairs |
| 20 | Fig receptacle (usually) 1.2-3.5(-5) cm diam. when dry |
| 20' | Fig receptacle 0.3-1.2 cm diam. when dry |
| 21 | Leafy twigs and lower surface of the lamina very sparsely and inconspicuously hairy |
| 21' | Leafy twigs and/or the lamina beneath ± densely and conspicuously hairy |
| 22 | Indumentum (in particular that of the fig receptacle) partly consisting of stiff and irritant hairs, which break off easily |
| 22' | Indumentum without irritant hairs |
| 23 | Petiole (1-)2-3.5 cm long; stipules 0.5-0.8 cm long; fig receptacle non-stipitate; ostiole surrounded by a tuft of hairs |
| 23' | Petiole (0.5-)1-2 cm long; stipules (0.5-)1-2 cm long; fig receptacle stipitate; ostiole not surrounded by a tuft of hairs |
| 24 | Stipules 0.5-1 cm long |
| 24' | Stipules (0.5-)1-2.5 cm long |
| 25 | Figs sessile, the receptacle non-stipitate; basal bracts 1.5-2 mm long |
| 25' | Figs (shortly) pedunculate, the receptacle stipitate; basal bracts 3-4 mm long |
| 26 | Indumentum of the fig receptacle short-velutinous (dense), the apex of the receptacle ± protracted |
| 26' | Indumentum of the fig receptacle hirtellous, strigillose, or absent, the apex of the receptacle convex, flat, or slightly umbonate |
| 27 | Lamina ± bullate above; indumentum partly consisting of irritant hairs, which break off easily; basal bracts 3-7 mm long and free |
| 27' | Lamina flat above; indumentum without irritant hairs; basal bracts 2-2.5 mm long and free or 4-6 mm long and connate |
| 28 | Basal lateral veins up to c. 1/3-1/2 the length of the lamina; basal bracts 2-2.5 mm long and free; receptacle sparsely puberulous and brown pulverulent |
| 28' | Basal lateral veins up to c. 1/5-1/3 the length of the lamina; basal bracts 4-6 mm long and connate; receptacle brown hirtellous |
| 29 | Lamina ± scabrous above |
| 29' | Lamina smooth above |
| 30 | Lamina glabrous beneath |
| 30' | Lamina hairy on the veins beneath |
| 31 | Lamina brown floccose-tomentose beneath; lateral veins (5-)6-9 pairs, the basal pair up to 1/5-1/3 the length of the lamina |
| 31' | Lamina brown (sub)strigillose beneath; lateral veins 4 or 5, the basal pair up to 1/3-1/2 the length of the lamina |
