Lake Chelan Algae Key

A1. Nonmotile algae without chloroplasts: Cyanobacteriophyta

A2. Nonmotile algae with chloroplasts

A3. Motile algae with chloroplasts and flagella

B1. Solitary motile algae

C1. Cells with one visible flagellum

C2. Cells with two equal length flagella

C3. Cells with 2 dissimilar flagella

C4. Cells heart-shaped and flattened, with 4 equal flagella: Tetraselmis

B2. Motile colonies with two or more cells

A4. Cells divided into paired semi-cells that are approximate mirror images of each other: Desmids

A5. Cells enclosed in glassy, ornamental frustules; many species exhibit gliding movement: Diatoms