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Vascular plants
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Ferns and fern allies
Spore-bearing, vascular plants having leaves known as fronds.
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Botany
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Salvinia molesta, Salvinia weevil, Salvinia minima
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Life history and identification of Salvinia species, a floating, rootless tree fern and a noxious aquatic weed. Site includes posters, instructions on submitting sightings, how to subscribe to a listserv on the weed, and a bibliography.
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