| | 1. Corolla white; flower fragrant; seed ± red |
| |
| | 2. Shrub, small tree; leaf obovate, leathery, tip generally rounded, margin turned under |
| P. tobira |
| | 2' Tree; leaf widely lanceolate, papery, tip acuminate, margin ± wavy |
| P. undulatum |
| | 1' Corolla dark red to purple black; flower not fragrant; seed purple-black or black |
| |
| | 3. Leaf oblong to obovate, leathery, margin turned under, lower surface densely hairy |
| P. crassifolium |
| | 3' LF oblong to oblong-ovate, papery, margin ± wavy, lower surface glabrous |
| P. tenuifolium
|