Azolla caroliniana

Common Name(s): Mosquito fern

Native to Florida

Video ID segment (2-3 minutes)

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For brief control information, see Efficacy of Herbicide Active Ingredients Against Aquatic Weeds by K. Langeland, M. Netherland, and W. Haller.

Video Transcript

Mosquito fern – Azolla caroliniana
There are six species of Azolla in the world. Mosquito fern is the species commonly found in Florida. Mosquito fern is a small, free-floating fern, about one-half inch in size. It is most often found in still or sluggish waters. Young plants are, at first, a bright or grey-green. Azolla plants often turn red in color. Mosquito fern can quickly form large, floating mats.

  • Azolla leaves are tiny, lacy-looking, and closely overlapping.
  • Azolla leaves can be green or rusty red.
  • Mosquito fern is a small, floating plant with green or rusty-red leaves.
  • Its leaves are tiny and overlapping.

mosquito fernView the herbarium specimen image from the University of Florida Herbarium Digital Imaging Projects.