| Name | Radula underwoodii Castle | 
| Authorship | Castle | 
| Rank | Species | 
| NomenclaturalStatus | NomLeg | 
| Placed in | Radula Dumortier | 
| Citation | 1959 J. Hattori Bot. Lab. 21: 37 | 
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Radula underwoodii Castle | 
| Identification made in | 2022 (1) | 
