| Salviniaceae | |
Azolla africana
| Desv. | Mém. Soc. Linn. Paris 6(2): 178 | 1827 |
| Salviniaceae | |
Azolla arbuscula
| Desv. | Mém. Soc. Linn. Paris 6: 178 | 1827 |
| Salviniaceae | |
Azolla bonariensis
| Bertol. | Misc. Bot. 21, t. 5, f. 2a–b | 1860 |
| Salviniaceae | |
Azolla caroliniana
| Willd. | Sp. Pl. 5(1): 541 | 1810 |
| Salviniaceae | |
Azolla circinata
| Oltz & Hall | Amer. Fern J. 58: 79 | 1968 |
| Salviniaceae | |
Azolla cristata
| Kaulf. | Enum. Filic. 274 | 1824 |
| Salviniaceae | ** |
Azolla decomposita
| Zoll. | Syst. Verz. 51 | 1854 |
| Salviniaceae | |
Azolla densa
| Desv. | Mém. Soc. Linn. Paris 6: 178 | 1827 |
| Salviniaceae | ! |
Azolla filiculoides
| Lam. | Encycl. 1(1): 343 | 1783 |
| Salviniaceae | |
Azolla guineensis
| Schumach. | Beskr. Guin. Pl. 462 | 1827 |
| Salviniaceae | |
Azolla imbricata
| (Roxb. ex Griff.) Nakai | Bot. Mag. (Tokyo) 39(463): 185 | 1925 |
| Salviniaceae | |
Azolla japonica
| Franch. & Sav. | Enum. Pl. Jap. 2(1): 195 | 1877 |
| Salviniaceae | * |
Azolla magellanica
| Willd. | Sp. Pl. 5: 541 | 1810 |
| Salviniaceae | ** |
Azolla mexicana
| Schltdl. & Cham. | Linnaea 5(4): 625 | 1830 |
| Salviniaceae | * |
Azolla mexicana
| C. Presl | Abh. Königl. Böhm. Ges. Wiss. 3: 580 | 1845 |
| Salviniaceae | ! |
Azolla mexicana
| Schltdl. & Cham. ex Kunze | Linnaea 18(3): 352 | 1844 [1845] |
| Salviniaceae | |
Azolla microphylla
| Kaulf. | Enum. Filic. 273 | 1824 |
| Salviniaceae | |
Azolla nilotica
| Mett. | Pl. Tinn. 54, t. 25 | 1867 |
| Salviniaceae | |
Azolla pinnata
| R. Br. | Prodr. 167 | 1810 |
| Salviniaceae | |
Azolla portoricensis
| Spreng. | Syst. Veg. [Sprengel] 4(1): 9 | 1827 |
| Salviniaceae | |
Azolla rubra
| R. Br. | | |
| Salviniaceae | * |
Azolla squamosa
| Molina | Sag. Stor. Nat. Chili (ed. 2) 301 | 1810 |