azolla or mosquito fern, duckweed fern, fairy moss, water fern

azolla mosquito fern duckweed fairy moss water growing nature background pattern abstract texture design summer tree spring grass wall leaf garden green leaves color wallpaper agriculture plant park environment growth field vegetable beautiful natural nutrition day botany foliage meadow agricultural aquatic flora photosynthesis surface outdoor purification animal feed caroliniana pinnata closeup dense fresh grow weeds