22 M - Foslie 



The most common form of the species resembles fig. 2, 

 t. 247 in. H a r v. Phyc. Brit, and usually becomes 3 — 5 cm. 

 high, not exceeding 10 cm., by 1 — 2 mm. in breadth. 1 ) 



As far as I have seen the plant only occurs in the li- 

 toral zone, either in rock pools or more frequently on steep 

 rocks covered by Fucus and OzothalHa, and on the walls of 

 grotto-shaped cavities together with Ptilota elegans. It is 

 only to be found on open coasts and appears best developed 

 in much exposed localities. All the specimens collected in 

 June, July and August were sterile. 



Distribution: The plant occurs all along the unsheltered 

 coast, and at several places, for inst. Mehavn, Berlevag, 

 Havningberg and Vardo, it is pretty common but not plen- 

 tiful. 



Delesseria sinuosa (Good, et Woodw.) Lamour. 

 Ess. p. 124; Fucus sinuosus Good, et Woodw. Linn. Trans. 3, p. 111. 



f. typica. 



Descr. Delesseria sinuosa J. G. Ag. Spec. Alg. 2, p. 691. 

 Fig. „ „ Harv. Phyc. Brit. t. 259. 



Exsicc. „ „ Wyatt. Alg. Danm. No. 62. 



f. quercifolia Turn. 

 Hist. Fuc. 1, p. 74. 



*.) K 1 e e n says (1. c): „When it (Delesseria alata) occurs on dark pla- 

 ces between tides it seems to assume the var. angustisima (Harv. Phyc. 

 Brit. t. 83). This form was common on stones beneath Fucacece". 

 Taking this for granted Kjellman records D. angustissima in his 

 Ish. Algfl. (p. 172). Of course I should not deny or even think it 

 unlikely that D. angustissima is to be found in Nordland, but, on 

 the other hand, I want to point out the fact that the narrow form of 

 D. alata also there is common just on localities like those quoted 

 by K 1 e e n for D. angustissima. Moreover he says that D. alata 

 grows in rock-pools between tides (and within the sublitoral zone), 

 bat he adds nothing about its occurrence in other parts of the li- 

 teral zone. I therefore suppose it to be highly probable that K 1 e e n s 

 J), alata var. augnstissima belongs to the .narrow form of D. alata. 



