Contribution. I. 81 



Syn. Fucus digitatus Wg. Fl. Lapp. p. 492; ex parte. 

 „ „ Fl. Dan. t. 392. 



Laminaria Clustoni Kjellm. N. Ish. Algfl. p. 298. 



Sublitoral, occurring in 2 — 10 fathoms water, or pro- 

 bably descending up to a still greater depth. It is luxuriant 

 and vigorous along the open coast, particularly in much ex- 

 posed localities. Here the stipe generally has a height of 

 1.5 — 2 m. by a diameter in the lower part of 3 — 5 cm. The 

 lamina has a length of 40 — 60 cm. But the plant often gets 

 much larger. In deep water or in somewhat sheltered places 

 the stem becomes smaller and the lamina proportionally lar- 

 ger, often with fewer and broader segments. Cp. Fosl. 1. c. 

 It enters pretty far into the greater bays but here it does 

 not thrive, getting small and stunted. I do not know when 

 it develops its reproductive organs. 



Distribution: The typical form common and very abun- 

 dant all along the open coast; f. compressa only found at 

 Berlevaag, scarce. 



Laminaria digitata (L.) Edm. 



Fl. Shetl. p. 54, sec. Le Jol. Ex. p. 56; Fucus digitatus L, Mant. 134. 



f. valida Fosl. 



Bidr. p. 27. 

 Descr. Laminaria flexicaulis f. valida Fosl. 1. c. 



„ digitata f. valida Fosl. Lam. Norw. p. 65. 



Fig. „ „ „ „ „ t. 3, fig. 1—4. 



f. grandifolia Fosl. 

 Lam. Norw. p. 60. 

 Descr. Laminaria digitata f. grandifolia Fosl. 1. c. 



f. complanata Kjellm. 



Kariska hafv. Algveg. p. 26. 

 Descr. Laminaria digitata f. complanata Kjellm. 1. c. et Alg. Murm. Meer. 38. 

 Fig. „ „ » Kjellm. Kar. hafv. Alg. 1. 1,14— 18. 



f. genuina Le Jol. 



Exam, p. 59. 



