| Name | Mortonia latisepala I. M. Johnston |
| Authorship | I. M. Johnston |
| Rank | Species |
| Placed in | Mortonia |
| Citation | 1940 J. Arnold Arbor. 21: 70 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Mortonia latisepala I. M. Johnston |
| Identification made in | [no date] (1), 2018 (1) |