Closterium gracile var. elongatum
(tree size 2)
Closterium gracile var. gracile
Closterium gracile var. tenue
Closterium gracile var. bicurvatum
Closterium gracile f. elongatum
Closterium gracile var. brevius
Closterium gracile var. intermedium
Closterium gracile var. striolatum
Closterium gracile f. longissima
Closterium gracile var. lundellii
Closterium gracile var. silesiacum
Closterium gracile var. substrigosum
Closterium gracile var. coloratum
Closterium gracile f. angulata
Closterium gracile f. sigmoideum
Closterium gracile f. sygmoideum
Closterium gracile f. tenue