14 T) p. \V. C. Areschoug. 



of local circumstances produced R. polyanthemos, so has R. Lindebergii 

 produced fche variety in question. 



Although in our country R. Lindebergii is well separated from R. 

 i n s\ilar is, and intennediate forms between these species here seem to be corn- 

 pletely wanting, it strikes me, as very probable, that the one species arose 

 from the other. Purther, when R. Lindebergii seems, with the exception of 

 the danish isles and the Jutlandic peninsula, wholly wanting outside the 

 Scandinavian peninsula, and R. insularis is more frequent in Denmark than 

 in our country, and, also, is said to be found in north Germany, I thought it 

 very probable that R. Lindebergii arose from R. insularis, in Denmark. 

 One of the questions which I bad set myself, during my travels in that country 

 last summer was, therefore, to clear up the matter, as to whether any intennediate 

 forms were to be found there. 1 was fortunate enough to find such an inter- 

 mediate form on the Jutlandic peninsula. When, for the first time, I obser- 

 ved that form in Seems Skov, near Itihe, in western Jutland, I considered 

 it to be R. Lindebergii. For it had the same strong and rieh armature on 

 the turiones as this species, although the prickles were more erect. The leaves 

 on the upper side were greyish green, and the terminal leaflets on the turiones, 

 as well as, on the flowering shoots, of a form very much like those of R. 

 Lindebergii. The inflorescence was narrow, racemose, and the lower branches 

 very short. <>n the other hand, it resembled R. insularis, by its pink petals 

 and filaments, also by the lowest branches being somewhat elongated, although 

 not so much so as in R. insularis. The peduncles were somewhat glandulous 

 and the anthers sparsely pilose. The former also can sometimes be the case 

 even with R. insularis (R. *confinis), but the pilosity of the anthers is a 

 peculiarity which is not found in the two species, between which this is an 

 intennediate form. 



This form is R. Langei, G. Jensen (ined.), and Frieder. & Geleit, Rubi 

 6X8. Dan. & Slesw. n. !). The relationship between these three forms is so 

 close, that the idea of a genetic connection between them must almost necessarily 

 arise. K. Lindebergii can, however, hardly be the ancestor of the two others, 

 because it, in consideration of its origin, - - as it seems confined within a 

 northern district — musl itself have arisen from some southern, immierated 

 species. Nor*tioea the idea strike me that R. Langei should be the ancestor 

 and fche two other Bpecies parallel ramitications from it. For in regard to 

 characteristics, this species is an intennediate form between R. Lindebergii and 



