| 1 | Petals 4–9.5 mm; staminal tube 2–5.5 mm, barbate at throat; anthers 0.3–1.2 mm long; locules 1- or 2- (or 3-)ovulate |
| 1' | Petals 35–80 mm, staminal tube 35–67 mm, not barbate at throat; anthers 2.5–6.5 mm long; locules 4–10-ovulate (sect. Grandiflorae) 2 |
| 2 | Calyx persistent in fruit; petals 4; staminal tube glabrous or rarely sparsely hairy without; filaments united to about halfway; ovary 4-locular; berry 12–18 mm, with thin soft pericarp |
| 2' | Calyx not persistent in fruit; petals 5 (6); staminal tube densely appressed hairy without; filaments united to near apex, the free tips 5–9 mm; ovary 5- or 6-locular; berry 23–30 mm, with thick hard pericarp |
