Tweet this page Like this page Email this page Share this page Home» Resources » Identification » Identification of algae » Freshwater algae » How to identify algae » Identification guide » Colonial » Cell contents (chloroplasts) are brown or golden-brown Cell contents (chloroplasts) are brown or golden-brown 3. Please select colony type. Colonies are roughly spherical aggregates of cells, each of which has whip-like flagella pointing outwards Synura Cells have envelopes and whip-like flagella; arranged in a loose branching pattern Dinobryon Roughly spherical cells embedded in common jelly Chrysocapsa Cells are joined by long stalks made of jelly