| Name | Polyalthia simiarum subsp. cochinchinensis T. B. Nguyen |
| Authorship | T. B. Nguyen |
| Rank | Subspecies |
| NomenclaturalStatus | NomLeg |
| Placed in | Polyalthia simiarum (Baillon) Finet & Gagnepain |
| Citation | 1974 Novosti Sist. Vyssh. Rast. 11: 189 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Polyalthia simiarum subsp. cochinchinensis T. B. Nguyen |
| Identification made in | [no date] (1) |