Algae are primitive plants. Some algae are microscopic (planktonic algae), others are thin and stringy or hair-like (filamentous algae), while still others are large and resemble higher plants but without true roots (muskgrass/chara).

 Filamentous Algae

Filamentous Algae

 Muskgrass

Muskgrass

 Pithophora Algae

Pithophora Algae

 Planktonic Algae

Planktonic Algae