598 University of California Publications in Botany [Vol.8 



4. Laminaria Sinclairii (Harv.) Farlow 



Holdfast at first composed of small, branching hapteres, soon send- 

 ing out numerous extensively creeping rhizomes from which fronds 

 subsequently arise ; stipe with small, deep-seated mucilage ducts, cylin- 

 drical, 2-3 mm. diam., 2-3 dm. long; blade linear, undivided or 

 slightly lacerated at the free end, plane, glossy, 1.5-3 cm. wide, 4-7 dm. 

 long, with mucilage ducts ; color very dark brown, black on drying. 



Growing on rocks in the lower littoral and upper sublittoral belts. 

 Abundant from the southern end of Vancouver Island to Pecho, San 

 Luis Obispo County, California. 



Farlow, in Farlow, Anderson and Eaton, Alg. Exsicc. Amer.-Bor., 

 no. 118 (nomen nudum) ; Setchell, Notes on Kelps, 1896, p. 44 ; Collins, 

 Holden and Setchell, Phyc. Bor.-Amer. (Exsicc), no. VII. Lessonia 

 Sinclawn Harvey, in Hooker, Flora Antarc, vol. 2, 1846, p. 460. 

 Laminaria saccharina Harvey, in Hooker and Arnott, Bot. Beechey, 

 1841, p. 407. Hafgygia Sinclairii Areschoug, Obs. Phyc, IV, 1883, 



p. 6. 



The combination Laminaria Sinclairii was first used by Farlow 

 as a nomen nudum in connection with the plants collected at Santa 

 Cruz, California, by Dr. C. L. Anderson and distributed in Farlow, 

 Anderson and Eaton's Algae Exsiccatae Americae-Borealis, fascicle 

 3, no. 118, in 1878. The specific name was first used by Harvey in 

 Hooker's Flora Antarctica (loo. cit.) in honor of Dr. Sinclair, who 

 first collected the species and sent it to Sir W. J. Hooker in whose 

 herbarium Harvey first saw it. Harvey states on page 87, part 1, of 

 the Nereis Boreali-Americana "The Lessonia Sinclairii, from Cali- 

 fornia, mentioned by Dr. Hooker, Fl. Awtarct., vol. 2, p. 460 must 

 for the present remain undescribed. ... is the Laminaria saccharina 

 of Harvey in Hook, and Am. Bot. Beechey, p. 407." It was listed 

 by Anderson (1891, p. 220) as "Laminaria Sinclairii Farlow and 

 Eaton" and De-Toni (1895, p. 343) adopted this combination. Ares- 

 choug (1883) gave the first diagnosis of the species. 



Laminaria Sinclairii may readily be distinguished from all other 

 species on our coast, except L. longipes Bory, by its relatively long 

 and narrow blade and slender stipe, and by its creeping rhizomes. It 

 is to be distinguished from L. longipes of the Bering and Ochotsk 

 seas, which it most closely resembles, by the absence of mucilage ducts 

 in the stipe of that species. 



