262 University of California Publications. [botany 



Setchell (1900, p. 122) and may perhaps be viewed as subforms 

 or states under that form. We feel that perhaps it is well to 

 separate and note them separately in this account, but we regard 

 them as colder and warmer water states of the ordinary form of 

 the species. Certainly in some waters the summer form of a 

 plant would be placed under f . membranaeea while the winter form 

 of the same plant would be placed under f. linearis. Where the 

 water is always cold, the species may possibly assume only the 

 latter shape. 



Laminaria saccharina f. complanata Setchell and Gardner 



f. now 



Stipe long, up to 50 cm., terete below, soon flattened (20 mm. 

 wide and 3 mm. thick about two-thirds the way up), without 

 mucilage ducts. Blade 80-100 cm. long, 40-50 cm. wide just above 

 the base, ample, ruffled, with base decidedly cordate. JMncilage 

 ducts in the blade large and extremely abundant, just under the 

 surface layer of cells. 



Found in a single locality, growing on piles, in quiet water, 

 just below low water mark. Friday Harbor, San Juan Island, 

 Wash., N.L.G., No. C82! 



A very distinct form, easily recognized by its decidedly flat- 

 tened stipe. 



Hedophyllum sessile (Agardh) Setchell. 



Attached to rocks in the middle and lower literal zones. 

 Yakutat Bay, Alaska, Saunders (1901, p. 429) ; Strait of Juan de 

 Fuca, Harreij (1862, p. 167, under Laminaria apotht) ; Victoria, 

 B. C, Tilden, No. 344! uuder Laminaria sessilis; Bsquimalt, B. C, 

 W.A.S., No. 1877!; Port Renfrew, B. C, Butler and Volley, 

 No. 60! ; west coast of Whidbey Island and of San Juan Island, 

 Wash . , N.L. G. , No . 275 ! , etc . 



The first description of this species was by C. A. Agard\.( 1824, 

 p. 270), as from the southern seas. No more definite locality 

 was known, until the identity between this species and the 

 L. apoda of Harvey was established by J. (i. Agardh. At present 

 the species is known to range from Fort Ross, California, to 

 Yakutat Bay, Alaska. H. sessile is the type of the genus and 

 not M. subsessile as stated by Saunders (1901, p. 430). The 



