Azolla
mosquito-fern
2 species
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Azolla filiculoidesduckweed fern, large mosquito fern
Distribution: Occurring on both sides of the Cascades in Washington; British Columbia to California, east to Idaho and western Montana.
Habitat: Ponds, backwaters, slow-moving streams.
Origin: Native
Azolla microphyllaMexican waterfern fern, mosquito fern
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Texas.
Habitat: Ponds and backwaters, mostly at low elevations.
Origin: Native