Any of very many plant organisms, of the phyla Chlorophyta and Charophyta, that grow in damp places; a chlorophyte

Any algae of the phyla Rhodophyta, principally, and Glaucophyta, mostly reddish in colour.

Any of many seaweeds of the class Phaeophyceae.

Synonym of chrysophyte / Prymnesium parvum

Algae adapted to grow on ice, different species growing on freshwater and saltwater ice.

Chlamydomonas nivalis, the alga responsible for watermelon snow.

plural of blue-green alga

plural of yellow-green alga

Any member of the taxonomic class or phylum Cyanobacteria; a primitive photosynthetic organism similar to bacteria which is thought to have generated the first oxygen in the Earth's atmosphere.

Any alga, of the class Xanthophyceae, that have yellow carotenoid pigments as well as chlorophyll