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Azolla filiculoides Lam.

Pacific Mosquito Fern
Azollaceae

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Protologue: Encycl. 1: 343 (1783)
Pronunciation: A-zòl-la fi-li-cu-lo-ì-des
Etymology: Gr. azo, to dry + ollumi or olluo, to kill, destroy, in reference to how these plants die in dry conditions

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Jepson eFlora Key to Azolla

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Distribution:

Left: S.D. County Plant Atlas (http://sdplantatlas.org). Right: CCH2. Click to see current herbarium records.  

 
 
 
Azolla filiculoides --- Pacific Mosquito Fern --- Azollaceae
A floating aquatic, heterosporous fern. Plants can form large colonies on the surface of still water bodies.
Note the leaves along the stem, which have pouches harboring the blue green Anabaena azollae, a nitrogen-fixing symbiont.

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