As here circumscribed the family Salviniaceae includes the family Azollaceae, in accordance with updated phylogenetic research (Smith & al. 2006).

  • Floating leaves 1-2 mm long, abaxially without papillae. Stem glabrous === Azolla 

  • Floating leaves ca. 10-20 mm long, abaxially with distinct papillae. Stem hairy ===  Salvinia



Smith A.R., Pryer K.M., Schuettpelz E., Korall P., Schneider H. & Wolf P.G. (2006) A classification for extant ferns. Taxon 55(3): 705-731.

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith