L30 I'. Vf. C. Areschoug. 



p-ive me. It seems to be a shade form, which is almost destitute of glandules, 

 has an almost uniform armature, and has larger and broader leaves, than the 

 typical form. It reminds one not a little of R. corylifolius, Sm. * bahusi- 

 ensis, Schedtz. 



I also suspect, tliat this species derives its origin from the above mentioned 

 subspecies of 11. corylifolius. It is the variety nitens of that subspecies, 

 that in partikular reseinbles R. infestus, in the paniole and its armature, in 

 the form of the floral leaves, and the very long, glandulous peduncles. Of all 

 the Continental brambles, I hardly know any other species, that could have 

 produced R. infestus. The peculiar, intermediate place, this» species takes 

 between R. fruticosus, and R. corylifolius, and which has al ready been 

 mentioned by Pocke (Syn. Rub. Germ. pag. 272.), can thereby be explained, 

 for H. * bahusiensis has several characteristics in common with R. fruti- 

 cosus. It is in particular the var. nitens (pag. 91) growing in Skåne, that 

 seems to have a relationship to R. infestus. 



As R. infestus prefers to grow on stony places, much exposed to the 

 Bun, in moiintainous districts, so it is also probable that it tirst originated in 

 such localities. And wlien this species, as also R. bahusiensis, grow in Sweden, 

 within the same small area, although they never appear together, the supposi- 

 tion is not improbable, that R. infestus should have arisen within the borders 

 of our countiy. I am, however, inclined to assume that the northwest of Ger- 

 man v is the original hoine of this species, and that it has immigrated to 

 Bohuslän. 1 suppose t-herefore, that the intermediate form, gathered by Mr. 

 Schedtz near Uddevalla, is a shade form of R. infestus, which, in consequence 

 of the nature of the locality, somewhat approaches to R. * bahusiensis. Whe- 

 reas I am inclined to regard the form of R. * bahusiensis var. nitens, grow- 

 ing in the northwesi öf Skåne, as an attempt of this subspecies to produce R. 

 infestus, although the outward circumstances have not been such as to enable 

 it to produce a typical It. infestus. 



ka >u ma ii v other forms immigrated to our country, from the west part 

 of the continent, are here confined to the west coast, I presume that it is the 

 same case with this species. Certainly at first sight, it seems inexplicable, 

 ihat R. infestus should have jumped över the Jutlandic peninsula, which 

 otherwise constitutes the bridge, över which so many other continental species 

 immigrated to Sweden or Norway. But as R. infestus belongs to mountainous 

 träets, and such are uol to be found in the Jutlandic peninsula; probably, in 

 this may be found the reason of its absence from this peninsula, and, at 



