TIFFANY, L.H. 1927 (Apr.) New species and varieties of Chlorophyceae Bot. Gaz. 83(2): 202-206, pl. IX Spirogyra wabashensis, Oedogonium braunii var. zehneri, Oedogonium wabashense, Oedogonium howardii var. minus, Oedogonium areschougii var. americanum, Oedogonium michiganense |