330 University of California Publications. [botany 



A single plant, looking so much like a luxuriant Rhodochorton 

 that at first it was taken for one, resembles so closely what we 

 have considered to be Polysiphonia rill tun on the California]! 

 coast that it is referred to the same species. The P. villum of 

 J. G. Agardh is undoubtedly a Lophosiphonia as established by 

 Falkenberg, and, consequently, we are compelled to place the 

 species under that genus. Our Alaskan plant is the same as No. 

 246 of Collins, Holden and Setchell, P. B.-A., but is not the 

 same as the Pol. villum. No. 134 bis of Farlow, Anderson and 

 Eaton, Alg. Exsicc. Am. Bor. Our plants have no leaves, while 

 the last mentioned plant has well developed leaves at the bases 

 of the secondary branches. We are uncertain as to which, if 

 either, of these plants is the type, but believe that ours corre- 

 sponds more nearly to the description. In our plant, the creep- 

 ing, rhizoid-bearing stem bears longer or shorter branches along 

 the upper surface. The branches are sparingly branched, in turn., 

 and are endogenous in origin. The tips are attentuate and 

 slightly recurved, bearing no hair like growths. 



Rhodomela Larix (Turner) Agardh. 



On rocks, on exposed shores in the literal zone. St. Paul 

 Island, Alaska, RuprecM (1851, p. 219, under Fuscaria Larix); 

 west coast of Amaknak Island, Bay of Unalaska, Alaska, 

 W.A.S. ami A.A.L., No. 3251!; Unalaska and Norfolk Sound 

 (Sitka), Alaska, and Nootka Sound, B. C, Postels and RuprecM 

 (1840. p. 14); Nootka Sound, B. C, Turner (1819, p. 23, pi. 

 207. under Funis Larix) ; Puget Sound, Bailey and Harvey 

 (1862. p. 160); Point Roberts, Strait of Juan de Fnca, and 

 Esquimalt, B. C, Harvey (1862, p. 168); Port Renfrew, B. C, 

 Butler and Polley, No. 4; west coast of Whidbey Island, Wash., 

 N.L.G., No. 46! ; San Juan Island, Wash., Tilden, No. 209! 



A robust species with the branchlets arising spirally on the 

 main axes and to be distinguished from the various forms of 

 Odonthalia floccosa by this character. Turner's figure (1819, pi. 

 207. f. a.) of the habit represents a plant rather more pinnate 

 than any seen by us, but otherwise our plants are in agreement 

 with it. The figure of Postels and Ruprecht (1840, pi. 38, f. h.) 

 is small but represents a typical plant. Kuetzing's figure (1865, 



