Azolla filiculoides

Azolla filiculoides Lam. (Azollaceae). (L). © 2009 by Yves Krippel.Azolla filiculoides Lam.
EnglishWater fern
FrançaisFougère d’eau
DeutschGroßer Algenfarn
LëtzebuergeschGrousse Waasserfar
Class: Pteridopsida
Family: Azollaceae / Salviniaceae


R – extremely rare

Map of Azolla filiculoides

Further information

Azolla filiculoides often occurs in ponds, … in private gardens, where it is regularly introduced with other water plants. Azolla filiculoides was however recently found in 3 ponds situated in the open countryside, near the village of Bourscheid (10.7.2009, K.-G. Gessner; 30.7.2009, K.G. Gessner, Y. Krippel & P. Thommes) and can be considered as naturalized.

For more details:
Krippel, Y. & P. Thommes, 2021. Cyrtomium fortunei J. Sm. (Dryopteridaceae) and other garden escaped ferns in Luxembourg. Bull. Soc. Nat. luxemb. 123: 21-28.

More information about Azolla filiculoides in the region can be found in:
Muller, S., 2006. Prolifération spectaculaire d’Azolla filiculoides (Azollaceae, Pteridophyta) dans le canal de Jouy près de Metz (Lorraine, France) à l’automne 2005. Bull. Soc. Nat. luxemb. 107: 31-38. [PDF 828 Kb]

Suggested citation of this webpage

Krippel, Y., 2023. Azolla filiculoides Lam. In: Online atlas of the pteridophytes of Luxembourg. URL: [29.03.2023].