| Name | Sideroxylon lanuginosum subsp. rigidum (A. Gray) T. D. Pennington | 
| Authorship | (A. Gray) T. D. Pennington | 
| Rank | Subspecies | 
| NomenclaturalStatus | Unknown | 
| Placed in | Sideroxylon lanuginosum Michaux | 
| Holdings | 5 Specimens held in the Harvard University Herbaria identified as Sideroxylon lanuginosum subsp. rigidum (A. Gray) T. D. Pennington | 
| Identification made in | [no date] (5) | 
