Elodea nuttallii
Elodea canadensis (right)
Elodea nuttallii (left)
Photographer: Poul Evald Hansen
Elodea nuttallii
Photographer: Poul Evald Hansen
Elodea nuttallii
Photographer: Poul Evald Hansen
Elodea nuttallii
Photographer: Poul Evald Hansen