Botrydium

Botrydium is a genus of thalloid algae. Specimens can reach around 2 mm in size and produce tetraspores.

Species
Some 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