One image contains exactly “Micrasterias americana”. Below it are images with words that start with it or look like it.
Micrasterias americana
Christophe Brochard
Micrasterias truncata
Micrasterias thomasiana var. thomasiana
Micrasterias thomasiana var. notata
Micrasterias rotata
Micrasterias papillifera
Micrasterias oscitans
Micrasterias jenneri
Micrasterias fimbriata
Micrasterias denticulata var. angulosa
micrasterias crux
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