268 University of California Publications. [botany 



a manuscript name. The species is common on exposed points 

 in the vicinity of Monterey, where it has been collected by num- 

 erous botanists. The name, as given above, was first published 

 and the species was first described by Miss Tilden in her Ameri- 

 can Algae (Century IV, 1900). A full description and figures 

 have been given by MacMillan (1900). The blades arc of two 

 sorts, the sterile being narrow and with a distinct midrib, while 

 the fertile are broader, plane, and gladiate. On account of this 

 very marked dimorphism, Reinke (1903) has just made it the type 

 of a new genus which he has named Lessoniopsis. 



Postelsia palmaeformis Rupreeht. 



On rocks on exposed points. Strait of Juan de Fuca, B. C, 

 MacMillan (1902, p. 213). 



This locality marks the most northern limit of this species, 

 which ranges south from this point to Point Sur on the coast of 

 California. It is locally known as the "Sea Palm," and is to be 

 found in small forests or groves, at or near high water mark 

 where the waves arc strongest. 



Nereocystis Luetkeana (Mertens) P. & R. 



On stones, in the sublitoral zone, reaching its full develop- 

 ment in 10-12 fathoms of water. Plentiful in the attached con- 

 dition, from the Shumagin Islands to the region of Santa Barbara 

 Channel on the coast of California. Shumagin Islands, Alaska, 

 Saunders (1901, p. 431, under Xereeicysiis Priapus) ; Uyak Bay, 

 Kadiak Island, Alaska, 11 .A.S. and A.A.L., No. 5093! ; Yakutat 

 Bay, Alaska, Eev. Albin -Johnson, No. 5720!; Esquimalt, B.C., 

 Harvey (1862, p. 104); Port Renfrew, B. C, Butler and Policy, 

 No. 39; west coast of Whidbey Island, Wash., N.L.G., No. 686! ; 

 Port Orchard, Kitsap County, Wash., Tilden, No. 237! 



The distribution of this species extends from the neighbor- 

 hood of Point Conception, on the coast of Southern California, 

 to the Shumagin Islands on the coast of Alaska. Beyond this 

 point, it seems very unlikely that the species is to be found 

 attached. It is, however, found cast ashore or floating. It 

 comes ashore sparingly on the shores of the Bay of Unalaska, 

 where one of us found it in the summer of 1899. It is found 

 floating in masses of several acres in extent in the Bering Sea up 



