258 University of California Publications. [Botan* 



a dense circle just under the periphery; in the blade rather large, 

 about half way between the surface and the distinctly marked 

 i iff and wide medulla. 



In the sublitoral zone. West coast of Whidbey Island, Wash., 

 X.L.G., Nos. 157b!, 159!, and in Collins. Holden and Setehell, 

 P. B.-A., No. XXIX! 



Near to the preceding, but a larger plant, with bulla? less 

 marked or even absent, marking a transition to the broader and 

 and distinctly digitate forms of the species. 



We are inclined to refer Miss Tilden's No. 239, labelled L. 

 digitata, from Port Renfrew, B. C, to this form, although only 

 a portion of the plant is represented by the specimen distributed. 



Laminaria bullata f. cuneata Setehell aud Gardner f. now 



Stipe short, 1-2 cm. long, soon very much flattened. Blade 

 45-90 cm. long, 10-25 em. wide, sharply cuneate at the base, 

 broadening out above, split into one to several broader or nar- 

 rower divisions which usually extend to the very base, smooth 

 for the most part. Mucilage ducts as in the last. 



In the sublitoral zone, West coast of Whidbey Island, 

 Wash . , X.L.G., Nos . 69 ! , 11 Ob ! 



A form usually decidedly distinct from the preceding and 

 approaching the following. This is the only form which practi- 

 cally entirely lacks the bullae in the adult form. 



Laminaria bullata f. amplissima Setehell and Gardner f. 



uov. 



Stipe 2-4 cm. long, soon flattened. Blade 100-280 cm. long, 

 40-150 cm. wide, broadly cuneate to almost cordate at the base, 

 broader above, split more or less deeply into few and broad seg- 

 ments, with a fairly distinct row of large bulla? within each 

 margin. Mucilage ducts in the stipe in usually more or less 

 incomplete circles just within the periphery; in the blade large, 

 with conspicuous masses of secreting cells, one-third to one-half 

 the way between the surface aud the wide and distinct medulla. 



On piles or floating wood in the upper sublitoral zone, in quiet 

 water. Sitka, Alaska, Ida M. Badgers, No. 5729!; Friday and 

 Roach Harbors, San Juan Island, Wash., N.L.G., Nos. 277!, 

 680!, 683? 



