BotrydiumBotrydium is a genus of thalloid algae. Specimens can reach around 2 mm in size and produce tetraspores.SpeciesSome currently recognised species: Botrydium becherianum Botrydium corniforme Botrydium cystosum Botrydium divisum Botrydium granulatum Botrydium intermedium Botrydium milleri Botrydium pachydermum Botrydium stoloniferum Botrydium tuberosum ''Botrydium wallrothii''