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

B2. Motile colonies with two or more cells

C1. Cells with two equal flagella

C2. Cells with two dissimilar flagella

E1. Cells smooth (not spiny); enclosed in vase-like lorica, forming tree-like colonies: Dinobryon

E2. Cells covered with tiny, ornate scales (no long spines): Synura

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