1920] Setchell-Gardner : Chlorophyceae 213 



6. Cladophora Hutchinsiae (Dillw.) Kuetz. 



Plants glaucous green, up to 40 cm. high ; filaments 120-300;u 

 diam., stiff, flexuous, sparingly branched; ramuli few, secund, blunt, 

 with constricted nodes; cells 2-3 diam. long. 



Vancouver Island, British Columbia. 



Kuetzing, Phyc. Germ., 1845, p. 210; Collins, Green Alg. N. A., 

 1909, p. 345. Conferva Hutchimiae Dillwyn, Brit. Conf., 1809, 

 pi. 109. 



Cladophora Hutchinsiae var. distans (Ag.) Kuetz. 



Segments of primary branches longer than in the type, 280-400/i, 

 diam., with few secondary branches whose segments are 200-250/x 

 diam., 3-4 times as long as the diameter. 



West coast of Vancouver Island, British Columbia. 



Kuetzing, Sp. Alg., 1849, p. 392; Collins, loc. cit.; Setchell and 

 Gardner, Alg. N.W. Amer., 1903, p. 228. Conferva distans Agardh, 

 Syst., 1824, p. 120. 



Cladophora Hntchmsiae is one of the coarser species of the 

 Eucladophora section, whose branchlets are only slightly reduced in 

 diameter from the branches from which they spring. We have seen 

 no specimens from our coast and Collins (1909, p. 345) gives only 

 "Vancouver Island," stating {loc. cit., p. 346) that it is likely to be 

 found ' ' on the west coast south of Vancouver. ' ' In his Marine Algae 

 of Vancouver Island, however, Collins (1913, p. 104) lists only the 

 var. distans as occurring at Port Renfrew, where it was collected by 

 Butler and Policy. No. 127 of their collection, as distributed, which 

 is the plant in question, seems clearly to be Cladophora trichotama f. 

 elongata Collins. In his Marine Ckidophoras of New England, Collins 

 says (1902, p. 126) that the type of C. Hutchinsiae has never been 

 certainly known from New England, the one quoted by Farlow in 

 the Marine Algae of New England proving to be wrongly marked 

 and to belong to California. The status of the species on the West 

 Coast, therefore, is not exactly established. 



Cladophora Hutchinsiae is to be distinguished from both C. ovoidea 

 and C. MacDougalii by the stout branchlets, the ultimate ramuli being, 

 for the most part, of only one or two segments. 



There is doubt, at least, as to the reference of var. distans to our 

 coast, the Butler and Policy specimen (no. 127) seeming to be erron- 



