902 



275 Tanacetiim vnlqare Her. 



276 Taraxacum naevosiim Her. 



277 — spcclabile, var Her. 



278 Thalidnim alpimim Her. 



279 Thymiis serpylhim Ch. 



280 Tofieldia palustris Her. 



281 TrifoUiim repens Her. 



282 Triglochin palustre Her. 



283 Tussilago farfarus G. 



284 Urtica dioica Her. 



285 Utricularia vulgaris HH. 



286 Vaccinium myrtillns . Ch.fandNph 



287 — uliginosum Ch.(andNph 



288 — vitis idaea Ch. 



289 Veronica alpina Her. 



290 — beccabunga Her. 



291 — frutieans Ch. 



292 — officinalis .. Ch. 



293 -- serpyllifolia Her. 



294 Vicia eraeea Her. 



295 Viola palustris Her. 



296 — silvestris, rotundato-crenala Her. 



297 — trieolor, faeroensis Her. 



298 Zostera marina HH. 



1. Duration of life. 



Annuals and other hapaxanthic species which oniy flower once, 

 although not necessarily in the first year of growlh, are not strongly 

 represented in the natural plant-formations of the Færoes. Even in 

 the culture-formations, perennial species are dominant except in 

 cornfields. It is natural to expect that the insular climate with mild 

 winters, cold summers and high rainfall Ihroughout the year, must 

 inlluence in a favourable way the dominance of perennial species. 



The list of piants shows that there are 298 wild species of vas- 

 cular piants in the Færoes. The preponderance of perennial species 

 will be seen at a glance from the following tabulated summary; 

 I gives the number of summer-annuals, II the olher hapaxanth- 

 species, and III the perennial species. 



