342 Wisconsin Academy of Sciences, Arts, and Letters. 
Family PLANOSPORACEAE 
CHARACIUM A. Braun 1849 
Characium stipitatum (Bachm.) Wille 
Basil (rrr), Black (1) (rr), Brush (sss), Butterfly (rrr), Echo (rrr), 
Gull (1) (rr), Gull (2) (rr), Marion (r), Muldrew (rr), Nelson (r). 
Nine Mile (rr), Rosseau (rrr), Silver (1) (r), Thompson (rrr), Vernon 
(rr). 
Characium curvatum G. M. Smith 
Big Dudley (rrr), iBlack (1) (rr), Lake of Bays (rrr), Muskoka (rrr), 
Rowley (rr), Silver (1) (rr), Vernon (rr). 
Family DESMIDIACEAE 
GONATOZYGON DeBary 1856 
Gonatozygon aculeatum Hastings 
Brush (rr). 
NETRIUM Nageli 1849 
Netrium digitus Itzighs. & Roth. 
Pennsylvania (rrr). 
PENIUM Brebisson 1844 
Penium margaritaceum (Ehr.) Breb. 
Gull (2) (rrr). 
CLOSTERIUM Nitzsch 1817 
Closterium costatum Corda 
Long (1) (rrr). 
Closterium Ehrenbergii Menegh. 
Leech (rrr). 
Closterium angustatum Ktz. 
Brush (rr). 
Closterium rostratum Ehr. 
Marion (rrr). 
