L925] Setrhell-Gardner: Mclanophyceae 597 



with base decidedly cordate and with mucilage ducts large and 

 abundant, just under the surface layer of cells ; color dark. 



Growing on piles and on rocks in the upper sublittoral and lower 

 littoral belts. Observed in but a single locality, Friday Harbor, San 

 Juan Island, Washington. 



Setchell, Kelps of U. S. and Alaska, 1912a, p. 149. Laminaria 

 saccharvna f. complanata Setchell and Gardner, Alg. N.W. Amer., 

 1903, p. 262 ; Collins, Holden and Setchell, Phyc. Bor.-Amer. (Exsicc), 

 no. LXXXVIL 



Laminaria complanata, known as yet only from the type locality, 

 seems very distinct from other members of the saccharina-gvowy, on 

 account of its rather long and flattened stipe. It does not seem, so 

 far as the material available is concerned, to merge into true L. 

 saccharvna found in the same locality, even growing on the same piles 

 with it. 



3. Laminaria longipes Bory 



Holdfast at first composed of a few hapteres arising from the 

 basal portion of the stipe, these in turn, becoming rhizome-like and 

 giving off lateral secondary hapteres and lateral erect fronds; stipes 

 terete, smooth below, compressed at the summit, 8-15 cm. long, 4-6 

 mm. thick, without mucilage ducts ; blade plane, undivided, acuminate 

 or rounded at the apex, 10-20 cm. long, 2-A cm. wide, with large 

 mucilage ducts within the cortex. 



Growing on rocks in the Bering Sea (Agattu, Kyska and St. Paul 

 Islands). 



Bory, in Diet. Class., vol. 9, 1826, p. 189 ; Kjellman, Om Beringhaf. 

 Algfl., 1889, p. 43 ; Setchell, Alg. Prib. Isl., 1899, pp. 591, 592, pi. 95, 

 Kelps of the U. S. and Alaska, 1912a, p. 150 ; Setchell and Gardner, 

 Alg. N.W. Amer., 1903, p. 260. Lessonia repens Ruprecht, Tange Och., 

 1851, pp. 232, 350. Lamvnaria Ruprechtiana Le Jolis, Examen, p. 71, 

 or 590. (For explanation of the dates of this publication see Setchell, 

 1891, p. 214.) Anthrothamnusf Jongipes J. Agardh, De Lamin., 1867, 

 p. 26. 



We have followed J. G. Agardh in assigning the northern plant 

 with distinct rhizome-like basal portion to the Lamvnaria longipes 

 Bory, although we have not seen the type specimen. It closely 

 resembles the more southern L. Sinclavrii, but lacks the mucilage 

 glands of the stipe so well developed in the latter species. 



