Phycotheca Boreali-Americana. Collins, Holden & Setchell.

1667. Spirogyra orthospira Naeg.

Naegeli in Kuetzing, Sp. Alg., p. 441, 1849.

Petit, Spirogyres des Environ de Paris, p. 30, Pl. X, figs. 4 & 5,
1880.

Wolle, F. W. Algae of the U. S., p. 218, Pl. CXXXVI, figs. 10 & 11,
1887.

Collins, Green Algae of the U. S., p. 112, 1909.

S. majuseula, P. B.-A., No. 511.

Lake Quannapowitt, Reading, Massachusetts, May 23, 1910.

F. S. COLLINS.

Yale University Herbarium

YU.094728