1925] Setchellr-Gardner: Melanophyceae 685 



We have not been able to examine any of the specimens of Saunders' 

 collections, if such exist. There are no numbers quoted, and hence 

 we are not attempting to place them. Most of the plants, particularly 

 of the southern portion of the range, undoubtedly belong to f. 

 magnificus Gardner. 



3. Fucus evanescens f . pergrandis Kjellm. 



Fronds caulescent, robust, subcoriaceous, up to 40 cm. high, regu- 

 larly dichotomous, dark brown below to yellowish brown above, black 

 on drying ; segments elongated, linear to slightly cuneate, 1-2 cm. wide, 

 midrib distinct, percurrent, cryptostomata varying from none to 20 

 per sq. cm.; receptacles numerous, mostly complanate, occasionally 

 inflated, mucilaginous, 1-2.5 cm. wide, 2.5-4 cm. long, entire to bifid ; 

 conceptacles numerous, large. 



Growing on boulders in the middle and upper littoral belts. 

 Unalaska, Alaska, to Puget Sound, Washington. 



Kjellman, Om Spetsb. Thall., II, 1877a, p. 3 ; De-Toni, Syll. Alg., 

 1895, p. 203; Setchell and Gardner, Alg. N.W. Amer., 1903, p. 284; 

 Collins, Mar. Alg. Vancouver Isl., 1913, p. Ill ; Gardner, Genus Fucus, 

 1922, p. 46, pi. 47. 



Setchell and Lawson, nos. 3284, 4049 (Herb. Univ. Calif., nos. 

 99125, 99123), Amaknak Island, Alaska, and in Collins, Holden and 

 Setchell, Phyc. Bor.-Amer., Exsicc, no. XLVI (sub F. platy carpus) ; 

 Rev. Albin Johnson, no. 5701 (Herb. Univ. Calif., no. 99126), Yakutat 

 Bay, Alaska; Gardner, no. 2230 (Herb. Univ. Calif., no. 201136), 

 Juneau, Alaska; Townsend, no. 5773 (Herb. Univ. Calif., no. 99129), 

 Kyska Island, Alaska; Butler and Polley, no. 20 ( Herb. Univ. Calif., 

 99127), Port Renfrew, British Columbia. 



The type locality of this form is Spitsbergen, where Kjellman 

 says it grows at a depth of several fathoms. There are three fragments 

 of the form in the Herbarium of the University of California under 

 no. 132622, from the Spitsbergen Islands, determined by Kjellman. 

 Although authentic, they do not entirely coincide with Kjellman 's 

 descriptions and type specimens. Apparently they are not representa- 

 tive specimens of this form. 



