Salvia regla Cav.
| Report on the flora of western and southern Texas V Havard (1885) Proceedings of The United States National Museum 8: 449-533 | |
| Four new species of Polygyra (Gastropoda: Pulmonata: Polygyridae) from Coahuila, Mexico A L Metcalf and D H Riskind (1978) Proceedings of The Biological Society of Washington 91: 815-827 |