A water mould, isolated onto sterile pumpkin seeds. Genus is characterised by zoospores which encyst immediately after the release from the zoosporangium. Related to the Saprolegnia disease of fish.
The Chromista are a eukaryotic supergroup, probably polyphyletic, which may be treated as a separate kingdom or included among the Protista. They include all algae whose chloroplasts contain chlorophylls a and c, as well as various colorless forms that are closely related to them. These are surrounded by four membranes, and are believed to have been acquired from some red algae.