| 1 | Stipules connate, 6-25 cm long |
| 1' | Stipules free, usually less than 6 cm long, on opening shoots, in some species up to 8 cm long |
| 2 | Internodes conspicuously different in length, the proximal ones of a season’s growth long, subsequently shorter, the ultimate ones very short, sometimes with persistent stipules forming terminal buds |
| 2' | Internodes not conspicuously different in length |
| 3 | Apex of the lamina caudate |
| 3' | Apex of the lamina acuminate, mostly shortly so |
| 4 | Lateral veins 4-7 pairs; margin of upper ostiolar bracts ciliolate |
| 4' | Lateral veins 7-16 pairs; upper ostiolar bracts glabrous (or puberulous outside) |
| 5 | Epidermis of petiole flaking off, at the uppermost or also at the basal part |
| 5' | Epidermis of petiole persistent |
| 6 | Basal lateral veins up to 1/5-1/3 the length of the lamina, mostly departing from the midrib at different distances from the base, their bases running parallel to the midrib |
| 6' | Basal lateral veins up to 1/10-1/5 the length of the lamina, their bases not running parallel to the midrib |
| 7 | Peduncle 0-0.1 cm long; basal bracts persistent |
| 7' | Peduncle 0.1-0.3(-0.5) cm long; basal bracts caducous |
| 8 | Figs pedunculate |
| 8' | Figs sessile |
| 9 | Fig receptacle 0.4-0.7(-1) cm diam. when dry |
| 9' | Fig receptacle 1.2-3.5 cm diam. when dry |
| 10 | Tertiary venation parallel to the lateral veins |
| 10' | Tertiary venation reticulate to subscalariform |
| 11 | Midrib of the lamina beneath laterally hairy, often with hairs concentrated in the axils of the lateral veins |
| 11' | Midrib of the lamina beneath with hairs evenly distributed or absent |
| 12 | Fig receptacle subglobose; basal bracts c. 3 mm long |
| 12' | Fig receptacle usually ellipsoid to ovoid, rarely subglobose; basal bracts 3-11 mm long |
| 13 | Tertiary venation parallel to the lateral veins (such as in F. elastica); lateral veins departing in wide angles (towards 90°) |
| 13' | Tertiary venation partly to largely parallel to the lateral veins to reticulate towards the margin or reticulate to subscalariform towards the margin; lateral veins usually departing in more acute angles (about 60°) |
| 14 | Fig receptacle ellipsoid, ovoid, or cylindrical; petioles and stipules usually 1.5-3 cm long |
| 14' | Fig receptacle subglobose, or if distinctly longer than wide, then the petioles and/or stipules usually up to 1.5 cm long |
| 15 | Fig receptacle usually 1-1.8 cm diam. when dry; basal bracts 3-8(-10) mm long; cultivated |
| 15' | Fig receptacle 0.5-1 cm diam. when dry, or if more than 1 cm diam., then the basal bracts 0.5-3 mm long; indigenous and cultivated |
| 16 | Lamina mostly up to 10 cm, rarely up to 15 cm long |
| 16' | Lamina mostly longer than 10 cm, up to c. 20 or up to c. 30 cm |
| 17 | Fig receptacle longer than wide (ellipsoid, obovoid, ovoid, or cylindrical) |
| 17' | Fig receptacle about as long as wide (subglobose) |
| 18 | Ostiole closed, the 3 upper ostiolar bracts clearly imbricate |
| 18' | Ostiole ± open, the upper 3 ostiolar bracts not or partly imbricate |
| 19 | Basal lateral veins up to 1/10-1/8 the length of the lamina |
| 19' | Basal lateral veins up to 1/4-1/3(-1/2) the length of the lamina |
| 20 | Ostiole ± open, the 3 upper ostiolar bracts not or partly imbricate |
| 20' | Ostiole closed, the 3 upper ostiolar bracts clearly imbricate |
| 21 | Basal bracts 2-3 mm long; fig receptacle with internal hairs |
| 21' | Basal bracts 3-8(-10) mm long; fig receptacle without internal hairs |
| 22 | Stipules usually 0.5-1 cm long |
| 22' | Stipules usually 1-2 cm long |
| 23 | Basal bracts 2-3 mm long; fig receptacle with internal hairs |
| 23' | Basal bracts 3-8(-10) mm long; fig receptacle without internal hairs |
| 24 | Apex of lamina rounded to short-acuminate, the acumen obtuse |
| 24' | Apex of lamina acuminate, the acumen usually acute |
| 25 | Fig receptacle longer than wide |
| 25' | Fig receptacle about as long as wide (or wider than high) |
| 26 | Fig receptacle 2-3 cm diam. when dry |
| 26' | Fig receptacle 0.3-2 cm diam. when dry |
| 27 | Stipules (1.5-)2-4 cm long; basal lateral veins unbranched, usually without smaller lateral veins below the (main) ones; base of the lamina rounded to cuneate (rarely subcordate) |
| 27' | Stipules 1-1.5(-2) cm long; (main) basal lateral veins often branched, often 1-3 pairs of smaller lateral veins below the main ones; base of the lamina cordate to rounded |
| 28 | Stipules brownish (woolly) tomentose to subvillous or glabrous; fig receptacle glabrous inside |
| 28' | Stipules sparsely to densely yellowish sericeous; fig receptacle hairy inside, on the inner surface or also on the pedicels |
| 29 | Fig receptacle 1-2 cm diam. when dry |
| 29' | Fig receptacle 0.3-1 cm diam. when dry |
| 30 | Indumentum (partly) set(ul)ose with irritating hairs |
| 30' | Indumentum not set(ul)ose |
| 31 | Basal bracts 1-3 mm long |
| 31' | Basal bracts 3-12 mm long |
| 32 | Stipules 1-1.5(-2) cm long; base of the lamina cordate to rounded |
| 32' | Stipules 2-4 cm long; base of the lamina rounded or to subattenuate |
| 33 | Lamina and stipules usually glabrous; apex acuminate, the acumen acute |
| 33' | Lamina and stipules hairy, or if glabrous, then the apex of the lamina short-acuminate and the acumen obtuse |
| 34 | Midrib (and lateral veins) ± impressed above; stipules brownish to whitish sericeous to puberulous; base of lamina mostly (sub)cordate with a narrow sinus |
| 34' | Midrib (and lateral veins) slightly prominent to flat or the midrib sometimes slightly impressed; stipules glabrous or white (minutely) puberulous; base of lamina mostly cuneate to rounded |
| 35 | Ostiole closed, the 3 upper ostiolar bracts clearly imbricate |
| 35' | Ostiole ± open, the 3 upper ostiolar bracts not or partly imbricate |
| 36 | Basal bracts semicircular to suborbicular, imbricate, the apex rounded |
| 36' | Basal bracts ovate, not (or only basally) imbricate, the apex obtuse |
| 37 | Basal lateral veins branched; lateral veins (3-)4-6 pairs |
| 37' | Basal lateral veins (usually) unbranched; lateral veins 6-12 pairs |
| 38 | Basal lateral veins 1/4-1/3(-1/2) the length of the lamina; apex of the lamina rounded to short-acuminate (with an obtuse acumen); leafy twigs, petioles and stipules usually glabrous |
| 38' | Basal lateral veins up to 1/10-1/4 the length of the lamina; apex of the lamina acuminate, or if short-acuminate to rounded, then the leafy twigs, petioles and stipules puberulous |
| 39 | Fig receptacle 1-2 cm diam. when dry |
| 39' | Fig receptacle 0.3-1 cm diam. when dry |
| 40 | Lamina on the midrib above and the midrib and lateral veins beneath white puberulous; base of the lamina cordate to rounded |
| 40' | Lamina above and beneath glabrous or sometimes minutely puberulous on the midrib beneath; base of the lamina cuneate to rounded |
| 41 | Basal bracts semicircular to suborbicular with a rounded apex, imbricate, covering 1/3-2/3 of the receptacle |
| 41' | Basal bracts (broadly) ovate, not (or only basally) imbricate, with an obtuse to acute or to rounded apex covering up to 1/3 (or 1/2) of the receptacle |
| 42 | Apex of the lamina acuminate, usually with an acute acumen; basal bracts ovate, not or only imbricate at the base |
| 42' | Apex of the lamina rounded to obtuse, or if acuminate, then with an obtuse acumen; basal bracts semicircular to broadly ovate, ± imbricate |
| 43 | Base of the lamina and the lower part of the margin not (or hardly) callose; smaller veins of the lamina, even the reticulum ± clearly visible beneath; basal bracts usually covering 1/2 or more of the fig receptacle |
| 43' | Base of the lamina and (at least) the lower part of the margin ± distinctly callose; smaller veins of the lamina usually not clearly visible to obscure; basal bracts covering up to 1/2 of the fig receptacle |
| 44 | Basal bracts 0.5-2.5 mm long |
| 44' | Basal bracts 3-8(-10) mm long |
| 45 | Ostiole closed, the 3 upper ostiolar bracts clearly imbricate |
| 45' | Ostiole ± open, the 3 upper ostiolar bracts not or partly imbricate |
| 46 | Lateral veins 6-10 pairs, the basal pair unbranched, sometimes faintly branched |
| 46' | Lateral veins (3-)4-6 pairs, the basal pair branched |
