| 1 | Mature leaves glabrous or nearly glabrous beneath. |
| 1' | Mature leaves densely pubescent beneath. |
| 2 | Secondary veins rather obsolete, irregularly arcuate; exterior of perianth almost glab ous.o ly partly sericeous; ovary 2-celled. |
| 2' | Secondary vems d1stmct, regularly arcuate; exterior of perianth evenly senceous; ovary 3-celled. |
| 3 | Ovary glabrous. |
| 3' | Ovary hirsute, at least at the top around the style. |
| 4 | Blade suborbicular to ovate or elliptic-ovate, 7-14 cm wide; style shorter than ovary. |
| 4' | Blade elliptic or ovate to oblong or lanceolate-oblong, 4-8 cm wide; style longer than ovary. |
| 5 | Blade densely sericeous or strigose below, not glabrescent. |
| 5' | Blade glabrous to sparsely or occasionally more densely strigose beneath, glabrescent. |
| 6 | Lower side of blade and inflorescence gray to yellow sericeous; secondary veins 9-13 on each side, distinctly or indistinctly conjugating near the margin; ovary with a distinct differentiated glabrous area at base. |
| 6' | Lower side of blade and inflorescence densely rich yellow-brown to ferrugineous pilose; secondary veins 6-9, ending free; ovary with an inconspicuous very narrow glabrous area at base. |
