328 University of California Publications. [botany 



Pterosiphonia bipinnata (P. & R.) Falkenberg. 



On rocks and alga? in .the literal and upper sublitoral zones.. 

 Cape Nome, Alaska, W.A.S., No. 5732! (cast ashore) ; St. 

 Michael, Alaska, W.A.8., No. 5242x!, in Herb. D. C. Eaton, 

 No. 13! ; west shore of Amaknak Island, Bay of Unalaska, Alaska, 

 W. A.K. and A.A.L., No. 3257!; near Iliulink Unalaska, 

 Alaska, ]Y.A.S. and A.A.L., Nos. 4054b!, 5009!, 5014! ; Uyak 

 Bay, Kadiak Island, Alaska, W. A. 8. and A.A.L., No. 5094!; 

 Harvester Island, Uyak Bay, Kadiak Island, Alaska, W.A.S. and 

 A.A.L., Nos. 5108!, 5135!; St. Paul, Kadiak Island, 'Alaska, 

 W. A.S. and A.A.L., No. 5143!; Orca, Alaska, W.A.S. and 

 A.A.L., No. 5163!; Port Renfrew, B. C, Butler and Volley!; 

 Whidbey Island, Wash., X.L.G., No. 20!; San Juan Island, 

 Wash., X. L. (}., No. 211! , Tilden, No. 318! , under P. nigrescens. 



Besides the localities given above, from which we have care- 

 fully studied specimens, Saunders has given (1901, p. 438) the 

 following localities for P. bipinnata: Yakutat Bay, Glacier Bay, 

 Sitka, ami Annette Island, Alaska. We have segregated the last 

 localities, since there has been some confusion as to the real 

 • plant of Postels and Ruprecht, but Falkenberg (1901, pp. 273, 

 274) has indicated the structure and removed from it Polysiphonia 

 Galifornica Harvey which has commonly been referred to it as a 

 synonym on the authority of J. G. Agardh. The type is a leafless, 

 slightly or not at all flattened species with distiehously pinnate 

 brauching, at least in the upper portions. The pericentral cells 

 vary from 11 to 18. 



Pterosiphonia dendroidea (Montague) Falkenberg. 



On rocks and alga» in the lower literal and upper sublitoral 

 zones. Esquimalt, B. C, Harvey (1862, p. 168, under Polysi- 

 phonia dendroidea); west coast of Whidbey Island, Wash., 

 X.L.G., Nos. 176!, 237!, 238!, 511a! 



A very distinct species sometimes placed under Pol. parasitica 

 as a variety, but kept distinct by Falkenberg. What appear to be 

 younger specimens have sometimes been referred to Pterosiphonia 

 pennata (Roth) Falkenberg, and Falkenberg (1901, p. 264) has 

 seen a specimen from San. Simeon Bay, San Luis Obispo County, 

 Cal., which may be the Peruvian Pol. spinifera Kuetzing. 





