Jaden brought along a mixed culture of fresh water algae, and we took some shots under the microscope.
Asterionella is a genus of pennate freshwater diatoms. They are frequently found in star shaped colonies of individuals. http://en.wikipedia.org/wiki/Asterionella
Arthrospira is a genus of free-floating filamentous cyanobacteria characterized by cylindrical, multicellular eftrichomes in an open left-hand helix.
Pediastrum is a genus of algae, in the family Hydrodictyaceae. It is a nonmotile coenobial (fixed number of cells) green algae that inhabits freshwater environments. – http://en.wikipedia.org/wiki/Pediastrum
two semicells but no constriction in the middle, each semicell has its own chloroplasts, cells are crescent to lance-shaped – https://www.msu.edu/course/bot/423/algallist6desmids.html