73 



119. Rumex Acetosa L. 



Common both in low-lying regions and on rock-lcdges and also on 

 iiill-plateaux, wliere il often occurs in a small dwarlish l'orni only a few 

 cm. high (f. alpina Rostr. p. 56). The hill forms cannot, liowever, be re- 

 ferred to R. arifolius All. as they have shiny, darli-brown nuls, at least 

 that is the case with the specimens which we brought home (e. g. Bordo: 

 Holgafjæld, 475 m.). 



Fl. June-July. Fr. x\ugust. 



t R. Acetosella L, 



Weed in the rectory garden at Thorshavn (W.). Reported by Landt 

 as not rare, but this statement must be due to a misunderstanding. 

 Fl. August. 



120. R. crispus L. 



Found in enclosed fieids, but rare; Sando: Sands (Råben,!) and 

 Trodum (!); Str.: Kirkebod); Syd.: Tværaa (!). 



This and the following species flower in July and bear fruit in 

 August — September. 



121. R. domesticus Hartm. 



Common in enclosed fields at the villages, often in considerable 

 quantities. 



122. R. domesticus Hartm. x R. obtusifolius L. 



Rather common together with the preceding and tlie following. 



123. R. obtusifolius L. f. agrestis Fr. ; R. divaricatiis Fr. 

 Common in the same localities as the preceding. 



The above-mentioned /?u/77fa"-species of the group Lapatluim Campd. 

 were all doubtless originally introduced by human agency, but have now 

 become thoroughly naturalized. 



Order XXXIV. PORTULACACEAE. 



124. Montia rivularis Gmel. 



Very common partly as a weed in enclosed fields and partly amongst 

 moss along streams, but not at high attitudes. 

 Fr. July. 



Rostrup 1. c. p. 37 records also Montia fontana L. a, niinur ifime\.) as occurring 

 »in considerable quantities as a weed everywhere in enclosed fields« , but adds 

 that a gradual transition to M. rivularis is to be met with. »and even the most 

 tj'pical (!) specimens hardh' Va an inch high had frequently as finely netted and 

 shiny seeds as the latter« : this shows that onh' .1/. rivularis is to be met with, 

 as is also proved by Rostrup's specimens. M. minor appears to be a species with 

 a more limited and southern distribution than M. rivularis. which, c. g. occurs 

 both in Iceland and in Greenland. 



