371 



sund by Helgi Jonsson had very young cystocarps on the leaf- 



less stems, another collected V12 97 at Trangisvaag had quantities 



of small tetrasporic leaves, which clearly iridicates that the piants 



fructify during the winter months, as is also the case with those 



growing along the Danish shores. 



Tliis species is very common, as already mentioned by Lyngbye 

 (1. c. p. 8): — »Ad insulas Færoenses copiose«. 



It w;is first recorded by Landt, 1. c. p. 231. 



Order RHODOMELACEAE. 

 LAURENCIA Lamour. 



30. L. pinnatifida (Gmel.) Lamour. J. Ag., Spec. Alg., Vol. 3, p. 656. 



Found in the littoral zone hoth on the dpen sea-shore closely 

 covering the hottom of a rock -pool situated at a high level, and 

 also in a sheltered locality on large stones near low-water mark. 

 I have not seen fructifying specimens, nor have I come across it 

 growing epiphytically as it may often be found doing on the Danish 

 coasts. 



It seems to be very rare along the coasts of the Færoes. 



Rostrup, who first found it, writes: — nve found it sparingly on 

 the coast of Stromo«. I found it on the east coast of Stromo, between 

 Thorshavn and Hojvig, in a large rock-pool situated at a high level, 

 and on Sydero at Tværaa near the snore on stones — where it was 

 first found by Ostenfeld — , and at Ordevig. 



POLYSIPHONIA Grev. 



37. P. urceolata (Lightf.) Grev. J. Ag., Spec. Alg., Vol. 2, pars 3, 

 p. 970. 



Ltgpica, Kjellm., N. I., p. 153 (118). 

 f. roseola, Ag. J. Ag., 1. c. p.971. 



This is a very common species both of the littoral and sub- 

 littoral zone. In the littoral zone it generally grows on rocks and 

 stones near low-water mark, often forming liere close societies of 

 wide extent, e. g. in the Cora//zna-belt. In the sublittoral zone it also 

 frequently occurs as an epiphyte especially on the stems of Lami- 

 naria hyperborea, where f. roseola is the most common. This 

 species may be met with down to a depth of at least 10 fathoms; 

 it prefers exposed coasts, but is also to be found in bays and fjords. 



Judging from the material in hånd this species appears to 

 attain to its highest development during summer; in spring it is 

 small. 



Botany of the Færoes. 24 



