| 1 | Blade scabrous above. |
| 1' | Blade smooth above. |
| 2 | Basal lateral veins reaching the margin below or at the middle of the blade. |
| 2' | Basal lateral veins reaching the margin above the middle of the blade. |
| 3 | Blade with arachnoid indument beneath. |
| 3' | Blade without arachnoid indument beneath. |
| 4 | Arachnoid indument on the blade brownish. |
| 4' | Arachnoid indument on the blade whitish. |
| 5 | Lamina beneath with patent hairs on the venation. |
| 5' | Lamina beneath with appressed hairs on the venation. |
| 6 | Secondary veins 4-5 pairs; blade oblong. |
| 6' | Secondary veins (4-)5-8 pairs; blade mostly elliptic to ovate to obovate or to suborbicular. |
| 7 | Secondary veins 2-3(-4) pairs. |
| 7' | Secondary veins 4-11 pairs. |
| 8 | Secondary veins (4-)7-11 pairs; terminal buds usually swollen. |
| 8' | Secondary veins 4-7 pairs; terminal buds slender. |
| 9 | Secondary veins 2-4 pairs. |
| 9' | Secondary veins 4-11 pairs. |
| 10 | Branch lets (rather) abruptly thickened and with wide cavities. |
| 10' | Branchlets gradually thickened and solid or with narrow cavities. |
| 11 | Blade smooth (to scabridulous) above, glabrous or sparsely puberulous on the smaller veins beneath, on the main veins sparsely to rather densely puberulous with straight hairs; tertiary venation olane to orominent. |
| 11' | Blade scabrous (to scabridulous) above, densely (to rather sparsely) puberulous with curved hairs on the smaller veins beneath: tertiarv venation prominent; blade mostly obovate. |
| 12 | Hairs on the lamina beneath about equal in length and basal veins usuallv branched. |
| 12' | Hairs on the lamina beneath distinctly different in length and/or basal veins unbranched. |
| 13 | Stipules 1.2-5 cm long; blade (initially) with arachnoid hairs beneath. |
| 13' | Stipules 0.5-1(-1.3) cm long; blade without arachnoid hairs beneath. |
