1925] Setchell-Gardner: Meianophyceae 645 



Alaria fistulosa f. stenophylla Setchell 



Blade narrow, 10-25 m. long, usually not over 30 cm. wide ; midrib 

 narrow ; sporophylls usually short and more or less decidedly obovate. 



Growing in belts just off shore and in isolated groups in quiet 

 waters, 5-10 fathoms. Ranging from the latitude of the Pribilof 

 Islands in the Bering Sea to southeastern Alaska. 



Setchell, in Collins, Holden and Setchell, Phyc. Bor.-Amer. 

 (Exsicc), no. XLTII ; Setchell and Gardner, Alg. N.W. Amer., 1903, 

 p. 276. 



Alaria fistulosa f. platyphylla Setchell 



Blade usually 6-9 dm. wide, up to 25 m. long, with broad, much 

 inflated midrib ; sporophylls numerous, up to 200, long and narrow, 

 30-50 cm. long, 3-6 cm. wide. 



Growing in deep water, usually found floating or cast ashore. Same 

 range as preceding. 



Setchell, in Collins, Holden and Setchell, Phyc. Bor.-Amer. 

 (Exsicc), no. XLII ; Setchell and Gardner, Alg. N.W. Amer., 1903, 

 p. 277. 



The fistulose midrib distinguishes this large, or at least long species, 

 which varies much in breadth of blade and size and number of sporo- 

 phylls. The two forms described above are fairly easy to segregate 

 but are probably ecological. This kelp grows in deep water and forms 

 beds in fairly deep water, its northern area comparable with that of 

 Nereocystis, with which it may be associated. 



tribe 2. ECKLON1EAE setchell 



Members of the Alariaceae having the outgrowths from the transi- 

 tion place maturing on the blade ; simple, or once or twice furcate 

 through wearing away of the central portion of the blade. 



Setchell, Kelps of the U. S. and Alaska, 1912a, p. 163. 



The genus Ecklonia is not represented on our coast, but Eiscnia, 

 whose early stages are like those of Ecklonia, occurs on the coast of 

 southern California and in Japan. Ecklonia is represented in the 

 Southern Hemisphere (Australia, New Zealand, Cape Good Hope, 

 and even up to the Canary Islands, as well as in Japan). 



