254 University of California Publications. I botany 



FajIily LAMINARIACE^. 



Chorda filum (L.) Lamouroux. 



On stones in the upper sublitoral zone. Safety Harbor, near 

 Cape Nome, Alaska, Newhall and Rhodes, No. 5790! ; Golofnin 

 Bay, Alaska, B. G. McGregor, No. 5669!; St. Michael, Alaska, 

 Herb. D. G. Eaton, No. 11!; Popof Island and Prince William 

 Sound, Alaska, Saunders (1901, p. 424); Sitka, Alaska, Pastels 

 and Buprecht (1.840, p. 19, under G. filum var. coridcect); Strait 

 of Juan de Fuca, B. C, MacMillan (1902, p. 219). 



This species, which is common on the coasts of northern and 

 northwestern Europe and the northeastern coasts of North 

 America, is not abundant at any locality in our territory, so fat- 

 as our present information is concerned. Ruprecht ( 1851 . p. 368) 

 says that it is probably plentiful in the Ochotsk Sea. Harvey 

 (1872, p. 463) reports it from Alaska without specific locality. 

 The locality farthest south is the one reported by Professor 

 Conway MacMillan in the neighborhood of Puget Sound, but it 

 is not at all plentiful. 



Saccorhiza dermatodea (De la Pylaie) J. Agardh. 



Although this species has been mentioned several times by 

 the older writers, under the name of Laminaria dermatodea, 

 there seems to be little doubt, but that some species of digitate 

 Laminaria has been confounded with it in every case. It seems 

 doubtful whether Harvey's Laminaria dermatodea (1862, p. 166) 

 from the Strait of Juan de Fuca aud from Esquimalt, B. C, can 

 really lie this species. J. G. Agardh refers Harvey's plant (1867, 

 p. 18) to his L. fissilis. 



Laminaria Bongardiana P. & R. 



Saunders (1901, p. 429) says of this species, that it is abundant 

 from Sitka to the Shumagin Islands, and gives as special locali- 

 ties. Kukak Bay, Prince William Sound, and Sitka. He does 

 not separate the species into forms as Areschoug and Kjellman 

 have done, and as we have attempted to do below. As we under- 

 stand L. Bongardiana , it is a species with the habit and color of 

 L. digitata, but with a circle of mucilage ducts in the outer cortex 

 of the stipe, aud with mucilage ducts in the blade just under the 

 outer layers of cells. 



