- 185 — 



belonging to F. inilatus were regarded as new species and described under 

 new names, e. g. Fucus furcatus (G. Ag. Sp.), Fiicus evanescens (C. Ag. 

 Sp.), Fucus edentalus (De la Pyl. Fl. Terre Neuv) and other. F. furcatus 

 and F. evanescens are evidently established on scarce material, but the 

 descriptions have been considerably enlarged by later autliors having 

 more rich material at hand. 



According to the iigure (Ic. alg. ined. Tab. 1 4) and the description 

 (G. Ag. Sp. [). 97) F. furcatus G. Ag. is to be regarded as a form most 

 closely connected to the exposed dwarf form of F. inflalus L. Already 

 by J. Agardh it is enlarged and identified with F. edentatus De la Pyl. 

 (J. Ag. Sp. p. !209), but in Spetsb. Alg. p. 40 he separates them again, 

 pointing clearly out that they are not easily distinguishable. He notices 

 also the resemblance between F. furcatus and F. evanescens saying aliout 

 the former: "Plurima habet Fuci evanescentis". Areschoug's F. furcatus 

 (Botaniska Notiser 18G8, j). 107, Aresch. Alg. scand. exsicc. no. 401) is 

 identic to the typical F. edentatus De la Pyl. and belongs to the main 

 form of F. inflatus L. Kleen's F. furcatus (Kleen Nord. hafsalg. p. :29) 

 includes both the main form and the exposed dwarf-form of F. inflatus L. 

 The small specimens (2 inches high), which he mentions in the descrip- 

 tion, must namely undoubtedly belong to this dwarf-form, as the linear 

 forms are by him reported under the name of F. distichus. 



According to the descrij)lion given by G. Agardh (G. Ag. Sp. p. 92) 

 and his figure (Ic. alg. ined. Tab. 15), F. evanescens G. Ag. is a broad 

 form, with comparatively broad receptacles, closely connected to the main 

 form of F. inflatus L. This species is considerably enlarged by J. Agardh 

 (Spetsb. Alg. p. 40 — 41) as his F. evanescens besides F. evanescens G. Ag. 

 also comprehends both the broad, inflated form of F. inflatus and narrower 

 forms. Kjellman's F. evanescens is still more enlarged (Spetsb. Alg. II 

 p. 3 — 8, Algv. Murm. p. 26, Arct. Alg. p. 202) as it besides broad and 

 narrow forms also includes the two dwarf forms , f. bursigera (J. Ag.) 

 Kjellm. and f. nana Kjellm. According to Striimfelt (1. c. p. 36) a form, 

 precisely agreeing with F. furcatus no. 401 in Aresch. Alg. scand. exsicc. 

 has been determined by J. Agardh as an indubitable F. evanescens. The 

 same is the case with Kjellman, as 1 have seen a specimen, fully agreeing 

 with typical F. edentatus De la Pyl., here at the Botanical Museum, Aliich 

 has been collected by Kjellman at Spitzbergen and determined by him as 

 F. evanescens. According to descriptions and practice it is thus evident 

 that F. evanescens auct. includes the main form, linear forms and more 

 dwarf forms of F. inflatus. 



According to the description of De la Pylaie (Fl. Terre Neuv. p. 84). 

 F. edentatus De la Pyl. is identic with F. furcatus Aresch. (Aresch. Alg. 

 scand. exsicc. no. 401). The specimens of F. edentatus De la Pyl. which I 



