| Ruehssia bourgaeana (Baill.) L.O. Alvarado, 2021 |
| Ruehssia callichicola (Carnevali & Juárez-Jaimes) L.O. Alvarado, 2021 |
| Ruehssia callosa (Juárez-Jaimes & Stevens) L.O. Alvarado, 2021 |
| Ruehssia carterae (Stevens & Juárez-Jaimes) L.O. Alvarado, 2021 |
| Ruehssia coulteri (Hemsl.) L.O. Alvarado, 2021 |
| Ruehssia cuixmalensis (Juárez-Jaimes & L.O. Alvarado) L.O. Alvarado, 2021 |
| Ruehssia edulis (S. Watson) L.O. Alvarado, 2021 |
| Ruehssia gallardoae (Lozada-Pérez) Lozada-Pérez, 2021 |
| Ruehssia gualanensis (Donn. Sm.) L.O. Alvarado, 2021 |
| Ruehssia gymnemoides (W. Rothe) L.O. Alvarado, 2021 |
| Ruehssia hiriartiana (Juárez-Jaimes & Stevens) L.O. Alvarado, 2021 |
| Ruehssia lanata (Paul G. Wilson) L.O. Alvarado, 2021 |
| Ruehssia laxiflora (Donn. Sm.) Gonz.-Martínez & Lozada-Pérez, 2020 |
| Ruehssia ludani (Juárez-Jaimes & Saynes) L.O. Alvarado, 2021 |
| Ruehssia macrophylla (Humb. & Bonpl. ex Schult.) H. Karst., 1849 |
| Ruehssia magallanesiana (Juárez-Jaimes) L.O. Alvarado, 2021 |
| Ruehssia magalloniae García-Mend., D. Sandoval & L.O. Alvarado, 2023 |
| Ruehssia mayana (Lundell) L.O. Alvarado, 2021 |
| Ruehssia mexicana (Decne.) L.O. Alvarado, 2021 |
| Ruehssia microcarpa (Juárez-Jaimes & Lozada-Pérez) L.O. Alvarado, 2021 |