Petrocelis cruenta J.Agardh

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899. Petroeelis cruenta
J. G. Agardh, Sp. Alg., Vol.-II, p. 490, 1851; Vol. HI, p. 375,
1876.
Farlow, Proc. Amer. Acad., Vol. XII, p. 239, 1877 ; Report of U.
S. Fish Commission for 1875, p. 715, 1876, both in part; N.
E. Marine Algae, p. 115, PI. XIV, fig. 1, 1881.
On rocks in lower part of litoral zone, Spectacle Island, Pen-
obscot Bay, Maine, July, 1896.
r. S. COLLINS.
With tetraspores, mostly immature.
NEW YORK BOTANICAL GARDEN
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