828 UniverHiiij of Culifornia Puhlicaiions. [botany 



Pterosiphonia bipinnata (P. & K.) Falkeuberg. 



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

 Cape Nome, Alaska, W.A.tS., No. r)732! (cast ashore) ; St. 

 Michael, Alaska, Tr..4..S., No. 5242x!, in Herb. 1). C. Eaton, 

 No. 18! ; west shore of Aniaknak Island, Bay of Unalaska, Alaska, 

 ir. .4.aS. (Did A.A.L., No. 3257!; near Iliuliuk Unalaska, 

 Alaska, IV.yl.^S'. and A.A.L., Nos. 40r)4b!, oOOD!, 5014!: Uyak 

 Bay, Kadiak Island, Alaska, W. A. H. (md A. A. L., No. 5094!; 

 Harvester Island, Uyak Bay, Kadiak Island, Alaska, IT.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, ir. .4 . N. and 

 A.A.L., No. 5163!; Port Renfrew, B. C, Butln- and PoIJey!; 

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

 Wash.. X. L. (r., No. 211 ! , Tilden, No. 318! , under P. nigreseens. 



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

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

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

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

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

 plant of Postels and Rnprecht, but Falkenberg (1901, })p. 273, 

 274) has indicated the structure and removed from it Polysiphonia 

 Calif ornica Harvej' which has commonly l)een 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 distichously pinnate 

 branching, at least in the u])per portions. The pericentral cells 

 varj' from 11 to 18. 



Pterosiphonia dendroidea (Montague) Falkenberg. 



On rocks and alga' in the lower litoral and upper sublitoral 

 zones. Esquimalt, B. C, Harrei/ (1862, p. 168, under Poli/si- 

 phonia dcndroidi^a) \ 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 })e 

 N'oungcr si)ecimens have sometimes been referred to PterosipJuaiia 

 ptiiiiata (Hotli) 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. 



