1925] Setchell-Gardner: Melanophyceae 599 



5. Laminaria Farlowii Setchell 

 Plate 56o 



Holdfast of strong, compact, branching liapteres; stipe short, 

 terete, flattening suddenly into the blade, 4-7 cm. long, 4-6 mm, diam., 

 without mucilage ducts; blade thick, coriaceous, abundantly wrinkled 

 or pitted with rather deep depressions, more or less in longitudinal 

 rows over the whole blade on both sides with scanty large mucilage 

 ducts ; color very dark brown. 



Growing in the lower littoral and very upper sublittoral belts. 

 Central California to southern California. 



Setchell, in Anderson, List of Calif. Mar. Alg., 1891, p. 220 (nomen 

 nudum), Trans. Conn. Acad., 1893, vol. 9, p. 355 (description), Regen- 

 eration among kelps, 1905, pi. 16, fig. 17 ; Collins, Holden and Setchell, 

 Phyc. Bor.-Amer. (Exsicc), no. XXXI. 



Laminaria Farlowii is not a very abundant or commonly collected 

 species, although in its general region, it is scarce rather than rare. 

 The peculiar corrugated appearance of the blade is difficult to describe, 

 but is a constant and a striking characteristic. 



6. Laminaria personata S. and G. 



Plate 61 



Fronds attached by an ample parenchymatous discoid base, yellow- 

 ish brown in color, 4-6 dm. high ; blade plane, broadly cmieate beloM% 

 12-20 cm. wide, mucilage ducts in the outer cortex, relatively sparse ; 

 stipe 8-12 cm. long, 4—5 mm. diam., terete below, flattening into the 

 blade, without mucilage ducts. 



Growing on rocks in the upper sublittoral belt. Alaska [Yakutat 

 Bay, Kukak Bay and Popof Island (Saunders), Sitka (Gardner)]. 



Setchell and Gardner, Phyc. Cont., VII, 1924, p. 10. Laminaria 

 solidungula Saunders, Alg. Harriman Exp., 1901, p. 429 ? ; Setchell 

 and Gardner, Alg. N.W. Amer., 1903, p. 260 (?) ; Setchell, Kelps of 

 U. S. and Alaska, 1912a, p. 150 ( ?) (none of these of J. G. Agardh). 



This species of Laminaria is the only one we have seen from 

 Alaskan waters which has a disk-shaped holdfast, and in this respect 

 it resembles L. ephemera Setchell, a species extending southward 

 from Puget Sound to central California (Carmel Bay). Only a few 

 specimens were observed at Sitka, and Saunders {Joe. cit., p. 429) 

 remarks on the occurrence of his L. salidungula: "Occasional in the 



