54 University of California Publications in Botany [Vol. 10 



Fucus evanescens f. irregularis Kjellm. 



"f. circa 15 cm. alta, fronde crebre irregulariter dichotoma, seg- 

 mentis plurimis ad costas validas reductis, summis tantnm alatis. 

 angustis, obsolete costatis, apicibus truncatis; receptaculis limitatis 

 ovatis, obovatis, oblongis vel obcordatis; scaphidiis minoribus." 



"Beringbn, sparsam; spridd inom litoralregionen ; med recep- 

 takler." 



Kjellman, Om Beringh. Algflora, 1889. p. 35. 



A photograph of the type specimen indicates to me that this form, 

 segregated by Kjellman on Bering Island, is hardly to be considered 

 an entity but rather a battered and distorted plant of some other form. 

 To my knowledge it has not been recognized since its original discovery ; 

 but if a valid form, it is quite likely to occur on the North American 

 side of the Pacific Ocean, hence I am including it here as a possibility. 



Fucus evanescens f. limitatus Kjellm. 

 Plate 58 



"f. fronde caulescente; segmentis tenuioribus, submembranaceis, 

 subdivaricatis, infimis cuneato-linearibus. superioribus sublinearibus, 

 3—5 mm. latis; costa parum prominente; receptacnlis distincte limi- 

 tatis, subpetiolatis vel simplicibns, ovato-ellipsoideis vel semel fureatis, 

 ramis plus minus longis, divaricatis, apice rotundatis. " 



" S :t Lawrencebay, Port Clarence, pa bada stiillena temligen ymnig ; 

 nagot siiUskaplig inom sublitoralregionen ; med receptakler. " 



Kjellman, Om Beringh. Algflora, 1889, p. 34. 



Fronds caulescent or subeaulescent, submembranaceous, dicho- 

 tomous, spreading, with rounded angles, yellowish brown, darker 

 brown on drying; segments short, cuneate-linear, apices rounded, 

 truncate, midrib distinctly reduced upward, cryptostomata few; 

 receptacles distinctly delimited, subpedicilate, seemingly lateral, entire 

 or bifurcate, ovoid-ellipsoidal, 12-18 mm. long. 8-12 mm. wide. 



Plate 59 



Growing in the upper sublittoral belt. Port Clarence to Norton 

 Sound, Alaska. 



Kjellman, Port Clarence, Alaska; R. C. McGregor, no. 5683 (Herb. 

 Univ. Calif., no. 99107), Besbora Island, Norton Sound, Alaska. 



Kjellman, loc. cit.; De-Toni, Syll. Alg., 1895, p. 202; Setchell and 

 Gardner, Alg. N.W. Amer., 1903, p. 282. 



The only material of which I am aware that has previously been 

 referred to this form since its establishment by Kjellman is that 

 referred by Setchell and Gardner (loc. cit.) from Norton Sound, and 

 the same material, two small fragments of plants, is again referred 



