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 » Unicellular » Cell outline elongated with basal holdfast Cell outline elongated with basal holdfast; usually attached to another object Filaments are short, usually attached to larger algae; chloroplasts and other organelles not found; cell contents blue-green or paler; exospores produced from tip Chamaesiphon Cell contents green, with membrane bound orgenelles (e.g. chloroplasts, nucleus), cell tip often pointed Characium