| Name | Polyalthia siamensis Boerlage |
| Authorship | Boerlage |
| Rank | Species |
| Placed in | Polyalthia Blume |
| Citation | 1899 Cat. Pl. Phan. 1: 26 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Polyalthia siamensis Boerlage |
| Identification made in | [no date] (2), 2020 (1) |
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