| Name | Alstonia congensis Engler |
| Authorship | Engler |
| Rank | Species |
| Placed in | Alstonia R. Brown |
| Citation | 1886. Bot. Jahrb. Syst. 8(1): 64. |
| Holdings | 4 Specimens held in the Harvard University Herbaria identified as Alstonia congensis Engler |
| Identification made in | 1997 (4) |