940 



nafans and P. gramineiis) they are elliptical. Wind-pollination is 

 characteristic for all the species, but frequently the fruit is not 

 developed. Several of the rarer species have never been found in 

 fruit on the Færoes (see further p. 916), but MyriophyUiim appears 

 to fruit with some degree of regularity^. 



It is thus evident that the Færoese lakes are inhabited by a 

 very meagre vegetation. George West (1905) in a recent memoir 

 on the Flora of the Scottish lakes has furnished material for a 

 comparison between the lakes of Scotland and the Færoes respec- 

 tively. From this it is quite evident that the lakes of the Scottish 

 Highlands closely resemble those of the Færoes, bolh as regards 

 vegetation and general appearance. The numerous photographs 

 which accompany West's paper, show several lakes astonishingly 

 like the Færoese ones, e. g. Figs. 49, 53, 55, 58, 63, 64 and 69 (1. c. 

 pp. 1002 — 1003). From the text one sees that the vegetation is 

 made up by the same species, with some additional not represented 

 on the Færoes, and that the general character is obviously similar. 

 The resemblance is, however, not so strongly appearent, since West 

 does not discriminate between the limnæ and the swamp forma- 

 tion, but treats them as one. 



Examples : 



1. The Kvanhauge-lake on Sydero. Litorella association: 

 Litorella and Nitella from the water-edge to a depth of about 50 Cms. — 

 Sparyaniiim-Potamogeton association: Potamogeton perfoliatus and Isoétes 

 lacustre from about 50 to 100 Cms. 



2. The Kvalbo-Ejde lake on Sydero. Litorella grows and 

 flowers on the west side quite out of the water, and extends out to a 

 depth of about 75 Cms. Flowering and sometimes fruiting specimens of 

 Myriophyllum and Potamogeton filiformis and sterile P. gramineus extend 

 landwards almost to the water-edge on the sandy west side. Myrio- 

 phyllum appeared in great numbers, some way further out, and also 

 some Isoétes lacustre. Where cliffs formed tlie margin, tliese were closely 

 covered by Cladophora glomerata (see above p. 936). 



3. Lake in Vatnsdal, Sydero. Litorella association: Litorella, 

 Isoétes lacustre, Juncus supinus (submerged). — Sparganiiim-Potamogeton 

 association: Potamogeton gramineus and P. praelongus, Myriophyllum 

 and Isoétes lacustre. In the outlet from the lake: Litorella, Heleocharis 

 palustris and Myriophyllum. 



4. Vaag-Vatn, Sydero. Marginal swamp-vegetation (Heleocharis 

 association) : Heleocharis palustris, Equisetum fluviatile, E. palustre, Carex 

 salina. — Litorella association: Litorella, Isoétes lacustre, Nitella opaca, 

 Callitriche hamulata and Myriophyllum. — Outward they pass into the 

 Sparganiiim-Potamogeton association with Potamogeton perfoliatus and 



' Riippia maritima may be given as a lake plant, since it has been found in 

 some small shallow ponds near the sea at Kvalbo. 



