371 
sund by Helgi Jonsson had very young cystocarps on the leaf¬ 
less steins, another collected 7 /12 97 at Trangisvaag had quantities 
of small tetrasporic leaves, which clearly indicates that the plants 
fructify during the winter months, as is also the case with those 
growing along the Danish shores. 
This species is very common, as already mentioned by Lyngbye 
(1. c. p. 8): — »Ad insulas Fseroenses copiose«. 
It was first recorded by Landt, 1. c. p. 231. 
Order RHODOMELACEAE. 
LAURENCIA Lamour. 
36. L. pinnatifida (Gmel.) Lamour. J. Ag., Spec. Alg., Vol. 3, p. 656. 
Found in the littoral zone both on the open sea-shore closely 
covering the bottom 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 Faeroes. 
Rostrup, who first found it, writes: — »we found it sparingly on 
the coast of Strom6«. 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 Tvaeraa near the shore on stones — where it was 
first found by Ostenfeld —, and at Ordevig. 
POLYSIPHONIA Grev. 
37. P. urceoiata (Lightf.) Grev. J. Ag., Spec. Alg., Vol. 2, pars 3, 
p. 970. 
f. typica , 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 here close societies of 
wide extent, e. g. in the CoraZ/z’na-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 hand this species appears to 
attain to its highest development during summer; in spring it is 
small. 
Botany of the Faeroes. 
24 
