405 



Sundene it grows in shallow water, but does not occur so abun- 

 dantlv as in the former place, doubtless because it prefers being 

 lefl dry at ebb-tide. 



I found it bearing ripe receptacles as eaiiy as the end of 

 April, and it keeps on fructifying throughout the summer, evidently 

 ceasing towards the end, as speeimens gathered late in July had 

 only a few receptacles left on them. Lastly, speeimens from the 

 beginning of Deeemher bore young receptacles, so the latter doubt- 

 less develop during the winter. This agrees well with what Kjell- 

 man (1. c. p. 244 [195]) savs is the case in Arctic Norway. 



This is an extremely common species of the Færoese eoasts ;is 

 already pointed out by Lyngbye: -- Ad littora Færoæ copiose«. 



FUCUS L. 



152. F. inflatus L., M. Vahl, Flora Danica, tab. 1127; Foslie, 

 Krit. fort., (Tromso Mus. Aarshefter, IX, 1886, p. 109); Rosenv., Grønl. 

 Havalg. , p. 834; Fucus vesiculosus y inflatus Lyngb., Hydrophyt., 

 p. 3. (Speeimens are lacking in his herbarium in Copenhagen). 

 Fucus furcatus Kleen, Nordl. Alg., p. 29. 



f. edentata (De la Pyl.) Rosenv. 1 1. c. Fucus edentatus de la Pyl., 

 Flore de Terre Neuve, p. 84, Paris 1829; Fucus furcatus and Fucus 

 edentatus J. Ag., Spetsbergens Alger, Tillag p. 40 2 ; Fucus edentatus 

 de la Pyl., f. typica Kjellm., N. I., p. 256 (204). 



f. disticha (L.), Fucus distichus L. partim 3 ; Lyngb., Hydrophyt., 



1 C. Agardh's Fucus furcatus (Spec. Alg., p. 97, 1821, Icones alg. ineditæ, 

 tab. XIV) is certainly older than De la Pylaie's Fucus edentatus, and, consequentlv, 

 on the ground of priority the former name ought to be preferred, but as the spe- 

 cimen of this species which C. Agardh described was — judging especially from 

 his figure — a small, poorly developed one (apparently a transitional form to 

 f. disticha) I think it most proper not to use his name. 



2 Cfr. Ruprecht, F. J, Tange des ochotskischen Meeres (Middendorff, Reise 

 in Sibir., 1. Band, p. 346). Ruprecht's objection, quite unjustifiable as it appears 

 to me, to J. Agardh's definition of Fucus furcatus in Spec. Alg. was the reason 

 why Agardh in »Spetsbergens Alger« described the two species Fucus edentatus 

 and Fucus furcatus as distinct, which again has created much uncertainty with 

 regard to Fucus inflatus. 



3 Linné's short description (Syst. Nat. Edit. 12, Vol. 2, p. 716) of Fucus distichus 

 snits all dwarf forms of Fucus inflatus, consequentlv, both f. linearis and f. disticha. 

 but I apply the latter name to the small, more robust forms which grow on exposed 

 eoasts in contradistinction to the sienderer f. linearis which grows in rock-pools. 

 Judging from Kjellman's description of his f. nana (Spetsbergens mar. klorof. 

 Thallophyter, II. p. 4) the latter appears to be some poorly developed speeimens. 

 belonging to f. disticha (cfr. his note 1. c. p. 7). 



