Yale University Herbarium

YU.094456

Phycotheca Boreali-Americana.

Collins, Holden, and Setchell.

1416. Spirogyra communis

(Hass.) Kuetz.

Kuetzing, Sp. Alg., p. 439, 1849.

Petit, Spirogyres des Environs de Paris, p. 16, Pl. V, figs. 1-3, 1880.

Wolle, F. W. Algae of the U. S., p. 213, Pl. CXLII, figs. 1 & 2, 1887.

De Toni, Syll. Alg., Vol. I, p. 747, 1889.

Zygnema commune Hassall, Brit. F. W. Algae, p. 148, Pl. XXVIII, figs. 5 & 6, 1845.

Floating among other algae, North Reservoir, Winchester, Massachusetts, Sept. 9, 1907.

F. S. COLLINS

Yale University Herbarium

YU.094457

Phycotheca Boreali-Americana.

1417. Spirogyra fluviatilis

Hilse.

Hilse in Rabenhorst, Algen, No. 1476.

Petit, Spirogyres des Environs de Paris, p. 27, Pl. V, fig. 13, 1880.

Wolle, F. W. Algae of the U. S., p. 216, Pl. CXXXVI, figs. 1-3, 1887.

De Toni, Syll. Alg., Vol. I, p. 762, 1889.

In floating mats with other plants, shore of a pond in Medford, Massachusetts, Sept. 7, 1907.

F. S. COLLINS

With spores; the vegetative, attached form of this species was distributed as P. B.-A., No. 1217.