2.'34 University of California Publications. ibotany 



Family LAMINARIACEJK. 



Chorda filum (L.) Lamoiiroux. 



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

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

 Bay, Alaska, B. C. McGregor, No. oGGO!; St. Michael, Alaska, 

 Herb. D. C. Eaton, No. 11!; Popof Island and Prinee William 

 Sound, Alaska, Saianlers (1901, p. 424); Sitka, Alaska, Postels 

 and Ruprecht (l<y40, p. 19, under G. filum var. coriacea) ; Strait 

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



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

 northwestern Europe aud the northeastern coasts of North 

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

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

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

 (1872. p. 4G3) reports it from Alaska without sj^eeific locality. 

 The locality farthest south is the one reported l)y 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 he little doul)t, but that some species of digitate 

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

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

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

 really l)e 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 hal)it and color of 

 Ij. 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. 



