https://minnesotawildflowers.info/fern/mexican-mosquito-fern
Azolla microphylla (Mexican Mosquito Fern): Minnesota Wildflowers
Photos and information about Minnesota flora - Mexican Mosquito Fern: tiny aquatic fern to about ½ inch long, branched, alternate overlapping leaves, often...
mexican mosquito fernminnesota wildflowersazollamicrophylla