1925] Setchell-Gordner : Melanophyceae 603 



Laminaria cuneifolia f. amplissima S. and G. comb. nov. 



Stipe 2-4 cm. long-, soon much flattened into the blade, with 

 mucilage ducts in a discontinuous circle just within the periphery ; 

 blade up to nearly 3 m. long, 1 m. wide, but usually smaller, broadly 

 cuneate to cordate at the base, rounded above, split into few segments, 

 the rows of bullae large and fairly distinct, particularly at the base 

 when the plants are young, at maturity the whole blade strongly 

 bullate ; mucilage ducts conspicuous and plentiful, associated with 

 groups of secreting cells one-half to one-third the way between the 

 surface and the distinct medulla; color very dark brown, black when 

 dry. 



Growing on piles, floats, and rocks in the upper sublittoral belt in 

 quiet water. Sitka, Alaska, to Puget Sound and Cape Flattery, 

 Washington. 



Setcheli and Gardner, Alg. N.W. Amer., 1903, p. 258; Collins, 

 Holden and Setcheli, Phyc. Bor.-Amer. (Exsicc), no. LXXXIV (both 

 sub L. bullata). 



8. Laminaria ephemera Setcheli 



Plate 58 



Holdfast strictly discoid, firmly attached to rocks; stipe terete, 

 slender, 2-4 mm. diam., 6-10 cm. long, devoid of mucilage ducts; 

 blade broadly rounded to narrowly cuneate at the base, linear, entire 

 or split more or less deeply into a few linear lobes or segments, 5-8 

 cm. wide, 3-4 dm. long, about 1 mm. thick, without mucilage ducts; 

 sori arranged in several longitudinal bands ; color light brown ; annual ; 

 fruiting in May. 



Growing in the upper sublittoral belt. Known from only four 

 localities, Cape Flattery and Tacoma, Washington, Port Renfrew on 

 the southwest coast of Vancouver Island, British Columbia, and 

 Carmel Bay, California. 



Setcheli, Notes on Algae I, 1901, p. 121, Kelps of U. S. and Alaska, 

 1912a, p. 150. Eenfrewia parvula Griggs, Postelsia, 1906, pp. 247- 

 274. pis. 16-19; Tilden, Amer. Alg. (Exsicc), no. 609. 



This is one of the few seemingly strictly annual species of the genus 

 Laminaria and the only one on our coast. It shares this distinction 

 with comparatively few species either in the family or in the entire 



