Phycotheca Boreali-Americana
Collins, Holden & Setchell.

Collins, Holden & Setchell.

1743. Pteridium serratum forma platyphyllum

Setchell & Gardner.

Setchell & Gardner, Algae of N. W. America, Univ. of Calif. Publ., Bot., Vol. I, p. 325, 1903.

Growing on the "necks" of pholiads, in the upper sublitoral zone, Port Defiance, Tacoma, Washington, May, 1910.

N. L. GARDNER.