270 University of California Publications. [botany 



Macrocystis pirifera (Turner) Agardh. 



On stones, usually in from five to ten fathoms of water. 

 Unalaska and Sitka, Alaska, Posfr/s <iii(J Euprecht (1840, \). 9); 

 Sitka, Alaska, Posieh ami Ruprerhf (1S4(), ]>. !), under Lrssoiiia 

 riliafa) , Ida M. Bodgers, No. 5727! ; Juneau, Sitka, and Wrangell, 

 Alaska, SaHiahrs (1901, p. 431); Esqnimalt, B. CHarrei/ (1802, 

 p. 1G4); Port Renfrew, B. C, Tilden, No. 518!; west coast of 

 Whidbey Island, Wash., N.L.G., No. 86! 



The long Bladder Kel]) is not uncommon on the western coast 

 of North America from somewhere in the neighborhood of 

 Magdalena Bay in Lower California up to the Strait of Juan de 

 Fuca. It does not seem to be plentiful in Puget Sound, itself, 

 or to the north, and it is doubtful as to whether it grows beyond 

 Sitka, Alaska. It may have floated into Unalaska, but it seems 

 certain that it does not grow there, at least on the side of the 

 Bering Sea. The species is found floating to the south of 

 Unalaska in the open ocean. Why the s]>ecies does not extend 

 farther to the north is certainly a C[nery. It cannot be a matter 

 of too low temperature, since what appears to be the very same 

 plant grows down into the Antarctic waters of nnich lower 

 temperatures than those of Bering Sea. The sori are supposed to 

 appear only on the bladderless radical leaves, 'but in specimens 

 from Peru, we have seen sori on leaves near the tip and provided 

 with bladders. Saunders (1901, j). 431) speaks of this species as 

 being confined to the elitoral zone, but we have never seen it 

 growing in over 12 or 15 fathoms of water. 



Eisenia arborea Areschoug. 



"A broken fragment of tliis ])lant was obtained at Wrangell, 

 and several specimens were obtained in Puget Sound," SainaJers 

 (1901, ]). 431). 



It certainly seems as if the recording of this plant within our 

 limits must be founded upon an error of determination since the 

 species is not known to grow north of San Pedro, California, and 

 in every way it has the appearance of being a characteristic 

 member of the subtropical region. A plant collected at Whidliey 

 Island was determined by Saunders as being Eisenia, but a 

 careful examination shows it to be Laniiitaria Aiidcrsoiiii . 



