244 University of California Publications. [botany 



Island, Alaska, W.A.8. and A.A.L., Nos. 5075!, 5098! ; Kukak 

 Bay, Cook Inlet, Yakutat Bay, Glacier Bay, and Annette Island, 

 Alaska, Saunders (1901, p. 421); Esquimalt, B. C, Harvey 

 (1862, p. 167); west coast of Whidbey Island, Wash., A.L.G., 

 No. 200! 



Soranthera ulvoidea P. & R. 



On Odonthalia floeeosa and Rhodomela Larix, in the lower 

 literal zone. Yakutat Bay, Alaska, Saunders (1901, p. 422); 

 Sitka, Alaska, Postels and RuprecM (1840, p. 19); Wrangell, 

 Alaska, and Victoria, B. C, Saunders (1901, p. 422); Port 

 Renfrew, B. C, Butler and Volley, No. 104. 



The plants noted here are known to us only from the refer- 

 ences and are placed under the species without comment. The 

 plants examined are grouped under two forms as given below. 



Soranthera ulvoidea f. typica Setchell and Gardner nom.no v. 



Habitat same as preceding. West coast of Whidbey Island, 

 Wash., N.L.G., No. 107!; Friday Harbor, San Juan Island, 

 Wash., Til den, No. 245! 



The typical form of ibis species as described by Postels and 

 Ruprecht is nearly regular in outline, either oval ellipsoidal, or 

 very nearly globular. This is the plant figured by Kjellman 

 (1889, pi. 7, f. 4, 5) and also, less typically, by Saunders 

 (1898, pi. 29, f. 4, 5) and distributed by the latter in 

 Collins, Holden and Setchell, P. B.-A., No. 417. The two 

 specimens noted, above also belong to the type as it seems to us. 

 The more common northern form is the following. 



Soranthera ulvoidea f. difformis Setchell and Gardner f. nov. 



Frond variously and deeply lobed, sometimes very irreg- 

 ularly so. 



On same hosts as the two preceding. East shore of Amaknak 

 Island, Bay of Unalaska, Alaska, W.A.8. and A.A.L., No. 3276! ; 

 near Iliuliuk, Unalaska, Alaska, W. A.S. and A.A.L., No. 4073! ; 

 Uyak Bay, Kadiak Island, Alaska, W.A^S. and A.A.L., No. 

 5081!- St. Paul, Kadiak Island, Alaska, W.A.S. and A.A.L., 

 No. 5145!; Yakutat Bay, Alaska, Rev. Albin Johnson'. 



This form seems to prefer impure water, either brackish or 

 muddy. 



