Contribution. I. 67 



part of the coast, as at Svserholt (plentiful), Berlevaag, Vardo 

 and Ekkero (rather numerous). 



Fucus in flatus L; Vahl. 



Fl. Dan. t. 1127; L Fl. Lapp. p. 351. Cfr. Fosl. in Tromso Mus. 

 Aarsh. IX, p. 109. 



f. typica. 

 Descr. Fucus furcatus Aresch. Fuc. et Pycnoph. p. 107. 

 Exsicc. „ „ „ Alg Scancl exsicc. Nr. 401. 



f. latifrons Fosl. mscr. 

 Fucus inflatus Fl. Dan. 1. c. 



This species is rather variable, and may perhaps include 

 other forms than the above mentioned ones, which ought to 

 be kept distinct. At several places I met with a form pyg- 

 mcea on rocks at high-water mark. It is only 3 — 4 cm. long 

 bearing richly receptacles, but as yet I do not know whether 

 it may be regarded only a stunted form produced by unfa- 

 vourable conditions of life. I have, on the contrary, seen 

 specimens most nearly related to the typical form bearing 

 receptacles even 11 cm. in length. The form latifrons cor- 

 responds with f. grandifrons of F. serratus and f. vadorum 

 of F. vesiculosus. It generally bears air-bladders of a leng- 

 thened shape until 8 cm. long. The typical form also is 

 provided with such ones, though more seldom. 



The present plant is litoral, mostly occurring in the 

 lower part of the zone, and at several places it forms a 

 rather broad girdle, at others growing in company with 

 F. vesiculosus or F. serratus. Although it appears in great 

 abundance at most places along the unsheltered part of the 

 coast, the number of individuals seem in general to be less 

 than at West-Finmarken. It bears receptacles in June and 

 July (f. typica), and in the first part of August (f. vadorum). 

 The latter grows farther down than the typical form, at 

 extreme low-water mark, or perhaps descending into thesub- 

 litoral zone. It seems to prefer sheltered localities. 



