Centribution. I. 



135 



The present plant is litoral and grows in rock-pools at 

 lugh-water mark attached to Cladophora rupestris f. subma- 

 Tina, Specimens coUected in July were sterile. 



Distribution: Found only at Pasvig in Sydvaranger, 



rare. 



Gen. Cladophora Ktitz. 



Phyc. gener. p. 363. 



Cladophora rupestris (L.) Kiitz. 



Phyc. gener. p. 270; Conferva rupestris L. Spee. Pl. p. 1167, 



f. typica. 



Beser. Cladophora rupestris Harv. Phyc. Brit. t. 180. 



^ 



mg. 



H 



n 



Mxsicc, Conferva 



Cladophora 



» 



ir 



W 



Kiitz. Tab. Phyc. 4, t. 3. 



Harv. 1. c. 



Aresch. Alg. Scand. exsicc. Nr. 126 et 26^. 



Wittr. et Nordst. Alg. eisicc. Nr. 117. 



f. typica Wittr. et Nordst. 1. c. Nr, 618 øt 



927. 



f. submarina Fesl. 



in Wittr. et Nordst. Alg. exsicc. Nr. 019. 

 Descr, Cladophora rupestis f. submarina Fesl. 1, e. 



Exsicc, n n n n n 



Syn. Conferva rupestriB Wg- Fl. Lapp. p. 512. 



et Nr. 928, 



» 



» 



» 



Lyngb. Hydr. Dan. p. 156. 

 Sommerf. in Act. Nidros. p. 27. 



This alga at the coast of East-Finmarken never grows 

 so luxuriant as farther south. It attains a length of about 



12 cm. but it is in general much smaller. 



typical 



form lives on rocks or in rocks-pools in the lower part of 

 the zone, mostly at low-water mark, and f. submarina in 

 brackwater-pools at or a little above high-water mark. The 



r 



plant thrives best on open coast, and it bears zoospores in 



August. At Nordland I have tåken ^oospore-specimcMS v^ 

 the b^inniug of March, 



