Closterium rostratum var. brevirostratum
(tree size 1)
Closterium rostratum var. extensum
Closterium rostratum var. laevigatum
Closterium rostratum var. longirostratum
Closterium rostratum var. bulgaricum
Closterium rostratum var. sikkimicum
Closterium rostratum f. sigmoideum
Closterium rostratum var. angustatum
(tree size 1)
Closterium rostratum var. mammosisporum
Closterium rostratum var. minus
Closterium rostratum f. angustior
Closterium rostratum f. brevirostratum