| Name | Trigonotis opaca (I. M. Johnston) I. M. Johnston |
| Authorship | (I. M. Johnston) I. M. Johnston |
| Rank | Species |
| NomenclaturalStatus | Unknown |
| Placed in | Trigonotis |
| GUID | urn:lsid:ipni.org:names:121353-1 |
| Citation | 1940 J. Arnold Arbor. 21: 62 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Trigonotis opaca (I. M. Johnston) I. M. Johnston |
| Identification made in | [no date] (2) |