| 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 | Major basal lateral veins up to 1/3-1/2 the length of the lamina; cystoliths on both sides of the lamina (in dried material visible as minute pustules); ovary white |
| 4' | Major basal lateral veins 1/10-1/3 the length of the lamina; cystoliths (usually) only beneath; ovaries red(-brown) |
| 5 | Lateral veins 4-7 pairs; margin of upper ostiolar bracts ciliolate |
| 5' | Lateral veins 7-16 pairs; upper ostiolar bracts glabrous (or sparsely puberulous outside) |
| 6 | Petiole hairy, at least at the base |
| 6' | Petiole glabrous |
| 7 | Epidermis of the petiole (usually) flaking off, at least at the uppermost and/or basal part |
| 7' | Epidermis of the petiole persistent |
| 8 | Stipules at the apices of leafy twigs subpersistent and forming ovoid buds (the scars of the stipules concentrated at the base of the new season’s growth); peduncle 0.7-1.5 cm long |
| 8' | Stipules not forming distinct terminal buds; figs sessile or up to 0.5 cm long pedunculate |
| 9 | Peduncle 0-0.1 cm long; basal bracts persistent |
| 9' | Peduncle 0.1-0.3(-0.5) cm long; basal bracts caducous |
| 10 | Figs pedunculate or sessile with a peduncle-like stipe |
| 10' | Figs sessile |
| 11 | Figs sessile with a peduncle-like stipe (the basal bracts at the base of the stipe) |
| 11' | Figs pedunculate (the basal bracts at the apex of the peduncle) |
| 12 | Apex of the peduncle widened into a rim (bearing the basal bracts inside) |
| 12' | Apex of the peduncle not widened into a rim |
| 13 | Midrib of the lamina beneath laterally hairy, often with hairs concentrated in the axils of the lateral veins |
| 13' | Midrib of the lamina beneath with hairs evenly distributed or absent |
| 14 | Basal bracts (early) caducous; fig receptacle subglobose, 0.5-0.7 cm diam. when dry |
| 14' | Basal bracts persistent; fig receptacle ellipsoid to subglobose, 0.8-1.2 cm diam. when dry |
| 15 | Lateral and smaller veins (and often also the apex of the midrib) invisible |
| 15' | Lateral veins visible, smaller veins varying from clearly visible to ± obscure |
| 16 | Tertiary venation parallel to the lateral veins (such as in F. elastica); lateral veins departing in wide angles (towards 90°); margin often callose towards the base |
| 16' | 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°) |
| 17 | Fig receptacle ellipsoid, ovoid, or cylindrical; petioles and stipules usually 1.5-3 cm long |
| 17' | Fig receptacle subglobose, or if distinctly longer than wide, then the petioles and/or stipules usually up to 1.5 cm long |
| 18 | Fig receptacle usually 1-1.8 cm diam. when dry; basal bracts 3-8(-10) mm long |
| 18' | Fig receptacle 0.5-1 cm diam., or if more than 1 cm diam. when dry, then the basal bracts 0.5-3 mm long |
| 19 | Midrib (at least in the lower part) of the lamina slightly prominent; petiole, stipules and fig receptacle when dry usually blackish |
| 19' | Midrib (at least in the lower part) of the lamina slightly impressed; petiole, stipules and fig receptacle usually pale yellowish |
| 20 | Lamina mostly up to 10 cm, rarely up to 15 cm long |
| 20' | Lamina mostly longer than 10 cm, up to c. 20 or up to c. 30 cm |
| 21 | Fig receptacle longer than wide (ellipsoid, obovoid, ovoid, or cylindrical) |
| 21' | Fig receptacle about as long as wide (subglobose) |
| 22 | Ostiole closed, the 3 upper ostiolar bracts clearly imbricate |
| 22' | Ostiole ± open, the 3 upper ostiolar bracts not or partly imbricate |
| 23 | Basal lateral veins up to 1/10-1/4 the length of the lamina |
| 23' | Basal lateral veins up to 1/4-1/3(-1/2) the length of the lamina |
| 24 | Stipules distinctly hairy; margin of the lamina not callose towards the base; apex of the lamina acuminate |
| 24' | Stipules glabrous (or sparsely and minutely puberulous); margin of the lamina usually callose towards the base; apex of the lamina rounded to short-acuminate |
| 25 | Indumentum on leafy twigs and stipules brown |
| 25' | Indumentum absent or, if present, then white |
| 26 | Lower surface of the lamina ± densely puberulous on the veins |
| 26' | Lower surface of the lamina glabrous, or if hairy, then minutely so and only on the midrib |
| 27 | Ostiole ± open, the 3 upper ostiolar bracts not or partly imbricate |
| 27' | Ostiole closed, the 3 upper ostiolar bracts clearly imbricate |
| 28 | Basal lateral veins branched, 1/3-1/2 the length of the lamina; margin of the lamina not callose towards the base |
| 28' | Basal lateral veins unbranched, mostly up to 1/4 the length of the lamina, or if up to 1/3(-1/2), then the margin of the lamina ± callose towards the base |
| 29 | Ostiole (sub)conical |
| 29' | Ostiole flat, slightly prominent, or slightly sunken |
| 30 | Tertiary and smaller veins of the lamina obscure beneath; stipules 0.5-1 cm long; fig receptacle 0.3-0.4 cm diam. when dry |
| 30' | Tertiary and smaller veins of the lamina distinct; stipules mostly 1-2 cm long, or if 0.5-1 cm long, then the fig receptacle 0.5-0.8(-1) cm diam. when dry |
| 31 | Basal bracts 3-8(-10) mm long; fig receptacle 0.7-1.3(-1.8) cm diam. when dry |
| 31' | Basal bracts 1-3 mm long; fig receptacle 0.3-0.6(-0.8) cm diam. when dry, basal lateral veins up to 1/4-1/2 the length of the lamina, and/or petioles, stipules, and basal bracts usually glabrous |
| 32 | Petioles or stipules usually 1-2 cm long; basal lateral veins usually 1/10-1/4 the length of the lamina |
| 32' | Petioles and stipules usually 0.5-1 cm long; basal lateral veins usually 1/4-1/2 the length of the lamina |
| 33 | Basal bracts 2-3 mm long; apex of the lamina short-acuminate (with an obtuse acumen) to obtuse to subacute to rounded |
| 33' | Basal bracts 1.5-2 mm long; apex of the lamina usually acuminate to subcaudate |
| 34 | Stipules and/or petioles usually 0.5-1 cm long; apex of the lamina rounded to obtuse or to subacute to short-acuminate (with obtuse acumen); basal bracts 0.5-4 mm long |
| 34' | Stipules and petioles usually 1-1.5 cm long, or up to 3 or 4 cm long, respectively; apex of the lamina acuminate, or if rounded to obtuse, then the basal bracts 4-8(-10) mm long |
| 35 | Tertiary venation (nearly) invisible |
| 35' | Tertiary venation visible |
| 36 | Fig receptacle with internal hairs; midrib of the lamina flat to slightly prominent or impressed above; acumen of the lamina obtuse; basal bracts 2-3 mm long |
| 36' | Fig receptacle without internal hairs; midrib of the lamina impressed above; acumen of the lamina usually acute; basal bracts 3-8(-10) mm long |
| 37 | Apex of the lamina acuminate, the acumen usually acute; margin of the lamina not callose |
| 37' | Apex of the lamina rounded to short-acuminate, the acumen usually obtuse; margin of the lamina ± callose towards the base |
| 38 | Fig receptacle longer than wide |
| 38' | Fig receptacle about as long as wide (or wider than high) |
| 39 | Fig receptacle 2-3 cm diam. when dry |
| 39' | Fig receptacle 0.3-2 cm diam. when dry |
| 40 | Basal lateral veins (1/4-)1/3-1/2 the length of the lamina; tertiary venation of the lamina reticulate to subscalariform |
| 40' | Basal lateral veins up to 1/4 the length of the lamina, or if up to 1/3, then the tertiary venation of the lamina partly parallel to the lateral veins (towards the midrib) |
| 41 | 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 |
| 41' | 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) |
| 42 | Fig receptacle 1-2 cm diam. when dry |
| 42' | Fig receptacle 0.3-1 cm diam. when dry |
| 43 | Indumentum (partly) set(ul)ose with irritating hairs |
| 43' | Indumentum not set(ul)ose |
| 44 | Basal bracts 0.5-3 mm long |
| 44' | Basal bracts 3-12 mm long |
| 45 | Stipules 1-1.5(-2) cm long; base of the lamina cordate to rounded |
| 45' | Stipules 2-4 cm long; base of the lamina rounded or to subattenuate |
| 46 | Basal lateral veins curved, usually running close to the margin, unbranched; ostiole closed, the 3 upper ostiolar bracts clearly imbricate |
| 46' | Basal lateral veins straight or slightly curved, branched; ostiole ± open, the 3 upper ostiolar bracts not or slightly imbricate |
| 47 | Petiole 0.5-1(-1.5) cm long, 1-2 mm thick |
| 47' | Petiole 1-5.5 cm long, 2-3(-5) mm thick |
| 48 | Ostiole ± open, the 3 upper ostiolar bracts not or slightly imbricate |
| 48' | Ostiole closed, the 3 upper ostiolar bracts clearly imbricate |
| 49 | Base of the lamina rounded to cordate (with a narrow sinus); lamina puberulous on the venation beneath and on the midrib above |
| 49' | Base of the lamina cuneate to rounded; lamina glabrous |
| 50 | Ostiole closed, the 3 upper ostiolar bracts clearly imbricate |
| 50' | Ostiole ± open, the 3 upper ostiolar bracts not or partly imbricate |
| 51 | Basal bracts semicircular to suborbicular, imbricate, the apex rounded; areoles of lamina usually distinct beneath because of prominent veinlets |
| 51' | Basal bracts ovate, not (or only basally) imbricate, the apex obtuse; areoles of lamina obscure beneath |
| 52 | Basal lateral veins branched; lateral veins (3-)4-6 pairs |
| 52' | Basal lateral veins (usually) unbranched; lateral veins 6-12 pairs |
| 53 | Fig receptacle ellipsoid; petiole usually 1-2 cm long |
| 53' | Fig receptacle ovoid; petiole usually 0.5-1 cm long |
| 54 | Fig receptacle 1-2 cm diam. when dry |
| 54' | Fig receptacle 0.3-1 cm diam. when dry |
| 55 | Indumentum on various parts (as leafy twigs and midrib of the lamina beneath) brown floccose-tomentose |
| 55' | Indumentum not floccose-tomentose |
| 56 | Apex of the fig receptacle concave, the ostiole sunken; stipules 2-6 cm long, subpersistent |
| 56' | Apex of the fig receptacle convex to submammillate, the ostiole ± prominent; stipules 1-2 cm long, mostly caducous |
| 57 | Midrib impressed above; areoles of the lamina conspicuous beneath |
| 57' | Midrib slightly prominent to flat (or slightly impressed towards the base; areoles of the lamina obscure |
| 58 | Basal bracts 0.5-3 mm long |
| 58' | Basal bracts (3-)4-10(-18) mm long |
| 59 | Lamina on the midrib above and the midrib and lateral veins beneath white puberulous; base of the lamina cordate to rounded |
| 59' | Lamina above and beneath glabrous or sometimes minutely puberulous on the midrib beneath; base of the lamina cuneate to rounded |
| 60 | Basal bracts semicircular to suborbicular with a rounded apex, imbricate, covering 1/3-2/3 of the receptacle |
| 60' | 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 |
| 61 | Apex of the lamina acuminate, usually with an acute acumen; basal bracts ovate, not or only imbricate at the base |
| 61' | Apex of the lamina rounded to obtuse, or if acuminate, then with an obtuse acumen; basal bracts semicircular to broadly ovate, ± imbricate |
| 62 | 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 |
| 62' | 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 |
| 63 | Lateral veins 6-10 pairs; apex of the lamina (usually) short-acuminate |
| 63' | Lateral veins 10-13 pairs; apex of the lamina (usually) rounded |
| 64 | Basal bracts 0.5-2.5 mm long |
| 64' | Basal bracts 3-8(-10) mm long |
| 65 | Ostiole open, the 3 upper ostiolar bracts not or slightly imbricate |
| 65' | Ostiole closed, the 3 upper ostiolar bracts clearly imbricate |
| 66 | Lamina ± densely puberulous on the veins beneath |
| 66' | Lamina glabrous beneath |
| 67 | Stipules glabrous |
| 67' | Stipules yellowish sericeous |
| 68 | Basal lateral veins up to 1/20-1/10 the length of the lamina; apex of the lamina short-acuminate |
| 68' | Basal lateral veins up to usually 1/4-1/3 the length of the lamina; apex of the lamina usually rounded |
| 69 | Indumentum on various parts (as stipules and midrib of the lamina beneath) brown floccose-tomentose |
| 69' | Indumentum not floccose-tomentose |
| 70 | Leafy twigs (and often also on other parts) with abundant small dark brown appressed hairs; tertiary venation ± prominent beneath |
| 70' | Leafy twigs without such hairs or if present, then very sparse and inconspicuous; tertiary venation (almost) flat beneath |
| 71 | Ostiole ± open, the 3 upper ostiolar bracts not or partly imbricate |
| 71' | Ostiole closed, the 3 upper ostiolar bracts clearly imbricate |
| 72 | Basal lateral veins up to 1/10-1/4 the length of the lamina |
| 72' | Basal lateral veins up to 1/4-1/2 the length of the lamina |
| 73 | Lateral veins of the lamina 6-10 pairs; basal lateral veins unbranched, sometimes faintly branched |
| 73' | Lateral veins of the lamina (3-)4-6 pairs; basal lateral veins branched |
| 74 | Lateral veins 10-13 pairs |
| 74' | Lateral veins (3-)4-8(-9) pairs |
