1 | Corolla lobes dextrorse, sometimes only slightly |
1' | Corolla lobes in bud valvate |
2 | Corolla in bud acute or acuminate at apex; corolla lobes more or less symmetrical, pinkish or reddish |
2' | Corolla in bud rounded or obtuse at apex; corolla lobes falcate, white or greenish white |
3 | Leaves pubescent all over beneath |
3' | Leaves glabrous or pubescent only in nerve axils |
4 | Sepals ovate or oblong, 0.6-2.1 mm long, 1-2.1 times as long as wide. |
4' | Sepals narrow linear, 2.1-4 mm long, (2.3-)3.5-6 times as long as wide. |
5 | Sepals oblong to spathulate, 1.9-4 mm long; leaves usually shiny above; fruits distinctly torulose |
5' | Sepals ovate to oblong, 0.6-3 mm long; leaves not shiny above; fruits not torulose |
6 | Sepals longer than corolla tube, oblong |
6' | Sepals shorter than to as long as corolla tube, ovate to oblong |
7 | Corolla tube narrow, not noticeably wider at base; fruit dagger-shaped. — Philippines, Sulawesi, Borneo |
7' | Corolla tube frequently noticeably wider at base; fruit fusiform to linear. — Widespread |
8 | Sepals strongly reflexed |
8' | Sepals not reflexed |
9 | Leaves elliptic to obovate, base often cordate, coriaceous |
9' | Leaves elliptic, base rounded, papery |
10 | Inflorescence densely pale puberulent; corolla bud globular; fruits dagger-shaped |
10' | Inflorescence densely to sparsely dark puberulent; corolla bud ovoid to subglobular; fruits linear to fusiform |
11 | Leaves mostly obovate, base cordate, secondary veins very prominent beneath; fruit thick walled |
11' | Leaves mostly elliptic or oblong, base rounded to cuneate, secondary veins not or barely prominent beneath; fruit thin walled |