903 



Certain species merit special attention, which in other countries 

 may be hapaxanlhic, but in the Færoes, in my opinion, they 

 must be reckoned among the perennials: Montia lamprosperma 

 occurs both as an annual and as a perennial, because it is so in 

 the natural formations, while it is only in cornfields and gardens 

 that its annual form is found. The case is much the same with 

 Matricaria inodora, var. phaeocephala, which is perennial in the sand- 

 strand formation, but perhaps becomes annual, when it occurs as 

 a rare plant in potato-fields near the coast. The condition is less 

 clearly defined with regard to Cardamine hirsnta; in shady piaces 

 among cliffs, it is certainly not annual, but still, as a rule hapaxan- 

 lhic, hence I have placed it in the second column; as a weed in 

 gardens it may sometimes be an annual. In an earlier paper (Bor- 

 gesen and Ostenfeld Hansen 1896, p. 146), I pointed out that 

 Cochlearia officinalis in the Færoes sometimes behaves as a peren- 

 nial plant, since the same individual is able to produce flowers 

 more than once (see Fig. 171); this, however, is exceptional. 



This tendency to })ass from hapaxanthic to perennial has gone 

 farther in Viola tricolor and in Alopecurns geniculatns, both of which 

 are true perennials in the Færoes. 



The table shows that of the 298 vascular piants not less than 

 269 (c. 90 p.ct.) are perennial, and only 29 (c. 10 p.ct.) are 

 hapaxanthic. 



(I). Of the latter 21 (c. 7 p.ct.) are sum nier-annuals viz: 



Airopsis praecox (c) Galeopsis tetrahit (c) 

 Alectorolophus groenlandicus (p) Juncus bufonius (c) 



— minor (p) Koenigia islandica (n) 



Atriplex Babingtonii (h) Myosotis versicolor (c) 



Cakile maritima (h) Poa annua (c) 



Capsella bursa pasloris (c) Polygonum aviculare (h) 



Cerastium glomeratum (c) Senecio vulgaris (c) 



— tetrandrum (h) Spergula arvensis (c) 

 Euphrasia borealis (p) Stellaria media (c) 



— curta (p) Subularia aquatica (w) 



— minima (p) 



The habitats of these annual piants are indicated after the 

 names: c, meaning that the species occurs in the culture-formations, 

 /?, in the halophile fermations, n, in the natural inland-formations, 

 IV, that it is a water-plant, and p, that is a parasite. We find that 



