Algae lack true roots, leaves, or stems, and instead have simple thalli existing as unicells, filaments, or colonies. Algal taxa are primarily characterized by thallus structure, cell wall structure, pigmentation, and motility, along with other ultrastructural and molecular features. The algae range in size from tiny plankton to enormous kelp hundreds of meters in length, and are found in diverse environments. Like plants, all photosynthetic algae possess the pigment chlorophyll a and release oxygen as a byproduct of photosynthesis.
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Ankistrodesmus, Bulbochaete, Carteria, Characiosiphon, Chlamydomonas, Chlorella, Chlorococcum, Closterium, Coleochaete, Cosmarium, Dictyosphaerium, Eremosphaera, Eudorina, Fritschiella, Gonium, Haematococcus, Hydrodictyon, Mesotaenium, Micrasterias, Microspora, Mougeotia, Netrium, Oedogonium, Pandorina, Pediastrum, Platydorina, Scenedesmus, Selenastrum, Spirogyra, Staurastrum, Stephanosphaera, Stigeoclonium, Ulothrix, Volvox, Zygnema
Anabaena, Anacystis, Arthrospira, Calothrix, Cyanophora, Cylindrospermum, Eucapsis, Fischerella, Glaucocystis, Gloeocapsa, Gloeotrichia, Lyngbya, Merismopedia, Microcystis, Nostoc, Oscillatoria, Phormidium, Scytonema, Spirulina, Tolypothrix
Botrydiopsis, Botrydium, Ophiocytium, Tribonema, Vaucheria
Ochromonas, Synura	Cyclotella, Navicula, Synedra
Peridinium	Astasia, Distigma, Euglena, Phacus, Trachelomonas
References     Designed by Hannah Shayler   All images taken by Peter A. Siver and Hannah A. Shayler and may not be used or reproduced without permission.   © Copyright Peter A. Siver 2004