330 Universifi/ of California PuhUcations. fbotany 



A single plant, looking so much like a luxuriant Rhodocliortoii 

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

 have considered to be PohjsipJiotiia villuni on the Californian 

 coast that it is referred to the same species. The P. villion 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. viUiiin, No. 134 />/.s- of Farlow, Anderson and 

 Eaton, Alg. Exsiec. 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. Itut 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 (Tui-ner) Agardh. 



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

 Island, Alaska. Ruprecld (1851. p. 219. under F^israria Larix); 

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

 TT^A.*S. anil A.A.L., No. 32ol!; Unalaska and Norfolk Sound 

 (Sitka), Alaska, and Nootka Sound. B. C. Posfels and RnprrrJif 

 (1840. p. 14): Nootka Sound, B. C\. rm-nrr (1819. p. 23, pi. 

 207. under Funis Larix) ; Puget Sound. liaih'// and Hari'Pi/ 

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

 Esquimalt. B. C, Ha rvf i/ 0SG2. p. 168): Port Renfrew. B. C. 

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

 X.L.G., No. 46!: San Juan Island. Wash.. Tildiii. No. 209! 



A robust species with the l>ranehlets arising spirall\ on the 

 main axes and to be distinguished from the various forms of 

 OdontliaJia fiocrosa by this character. Turner's figure (1819, i>l. 

 207, f. a.) of the habit represents a plant ratlier 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, 



