91G 



Potamogeton a}])inns, foiind with floweiing spikes, but no fruits de- 



veloped. 

 P. gramineus, Ilowers sparingl}' and not in all piaces; fiuit-setting 



very meagre. 

 P. natans, like the foregoing species. 

 P. perfoliahis, like the foregoing species. 



P. praelongus, always found without spikes (occurs only in one place). 

 P. pnsillns, always found without spikes. 

 Psamma arenaria, as Agropyrnm jiinceiim. 



Pyrola minor, flowers sparingly and not in all piaces (cfr. Osten- 

 feld 1901 b, p. 51, and 1907, p. 843). 

 Rosa mollis, rare with flowers and hardly any fruit set; Landt 



mentions (1800, p. 198), that he transplanted this species into 



his garden, but that in the course of 4 years it did not Ilower. 

 Rubus saxatilis, flowers, but gives fruit very sparingly. Landt 



States (1800, p. 198) that »the fruits ripe very seldom, because 



of the storms which almost always occur at the time of fructi- 



fication«. 

 Rnppia niaritima, as Potamogeton alpimis. 

 Sparganium affine, flowers in many piaces, but ripe fruits are very 



rarely met with. 

 Tanacetnm valgåre, flowers late, hardly any fruit set. 

 Utricularia inilgaris, always found without inflorescenses (one place 



only). 

 Vaccinium myrtillns. Landt (1800, p. 192) mentions, that in certain 



years it does not ripen its fruits. We found only very few ber- 



ries of this and the following species. 

 V. nliginosiim, as the foregoing, but not so common. 

 V. vitis idaea, rarely flowering, and very seldom with ripe fruits. 

 Veronica officinalis, flowers abundantly, but fruits badly. 

 Vicia cracca, flowers abundantly, but only once found with a few 



ripe pods with seeds. 

 Zostera marina, seems not to develop fruits, although it has been 



found with inflorescences. 



Most of the 36 species are rare in the Færoes, and that also 

 agrees with the supposition, that they are outside their true area, 

 and only with difficulty thrive on a few specially favourable piaces 

 on the islands. The majority of the Dicotyledons are probably in- 

 sect-pollinated (if not self-fertile), and as regards the Papilionaceae 



