Subclassis
Salviniidae
Cronquist, Takht. & Zimmerm. ex Reveal
pub. 1996
Ordo
Salviniales
Britt.
pub. Man. Fl. N. U.S.: 19. Oct 1901.
Familia
Azollaceae
Wettst.
pub. Handb. Syst. Bot. 2: 77. Nov 1903.
Genus
Rhizosperma
Meyen
syn. Azolla Lam.
Individual specimen entries are published in the sample database supplied with
The Compleat Botanica for species or varieties of this supra-generic taxon.