| 1 | Pedicels and calyx densely pubescent; fruit globose |
| 1' | Pedicels and calyx glabrous or sparsely pilose |
| 2 | Fruit oblong or ovoid; leaves narrowly oblong, 2-7 cm long; fertile twigs usually unarmed; a shrub or tree up to 7 m high |
| 2' | Fruit globose; leaves rather broadly oblong, 1-2 cm long; fertile twigs usually armed; a low bush up to 2 m high |
