| Name | Macrocalyx P. Constantin & J. Poisson |
| Authorship | P. Constantin & J. Poisson |
| Rank | Genus |
| NomenclaturalStatus | LaterHomonym |
| Placed in | Bombacaceae |
| Remarks | later homonym (non Kuntze 1891; nec Van Tieghem 1895). Type: M. tomentosa P. Constantin & J. Poiss. |
| Citation | 1908 Compt. Rend. Hebd. Séances Acad. Sci. 147: 637 |
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