l(>4 F. W. C. Areschoug. 



well as in Norway and even on the east coast, north of Skåne, this species 

 gets a miich smaller, simpler and fewer-flowered inflorescence. In Bohuslän, 

 however, a forma iricisa of this species grows (Lindeb. herb. rub. scand. n. 6), 

 which has a rather Compound inflorescence. The peduncles, when the inflore- 

 scence is Compound, are usually rather short, but in the simple inflorescence 

 lengthened. They are either furnished with small, slightly deflexed prickles, 

 or unarmed and glandulons, with sessile or somewhat stalked glandules. The 

 petals are sometimes white sometimes pink, ovate-spathulate, or, on the inland 

 form, in particular, broader, almost roundly obovate. The' filaments, generally, 

 are hardly longer than the styles. On a form at Lysekil in Bohuslän, they 

 are much shorter, almost abortive. The fruit is almost hemispherical. 



Although this species can in onr country, in regard to certain 

 characteristics, be somewhat varying, no important varieties thereby arise. 

 Neither is there any degree of divergence, worthy of remark, from the Conti- 

 nental, or English form of R. fruticosus. Still, the leaflets of this species, in 

 the southern part of its area, are smaller and more oval, also the outside 

 of the sepals greyish. These changes are to be ascribed to the warmer 

 cliinate, and characterise more or less all the South-European brainbles, at 

 least, when they grow in open sunny places. 



It is, undeniably, a circumstance worthy of remark, that R. fruticosus, 

 although of all the blackfruited brainbles, next to R. corylifolius, it is the 

 species, most common on the Scandinavian peninsula, and in regard to tho 

 extension of its area, is only surpassed by R. suberectus, ca>sius, and coryli- 

 folius (page 18), yet, it bas not here had power to produce any forms worthy of 

 notice. This is the more surprising, as, otherwise, the same species in the 

 western part of the continent bas produced a number of forms, yes, probably 

 given risc, not only to most of the species of Suberecti, but also to those of 

 ( lordifolii. 



In the introduetion (page 26), it bas already been laid down, that R. 

 suberectus is. in all probability, the parent species to Suberecti, because, to 

 judge from the whole of its present geographical extension, it is the oldest 

 species in the whole of this group. Also upon the Scandinavian peninsula, 

 where R. suberectus goes furtber towards the north than R. fruticosus, and 

 appears almost more in the interiör of the couutry, the geographical extension 

 of both these, the.most importanl Bpecies of that group, evince that R. sub- 

 erectus must be an oldcr species, than R. fruticosus. And the latter is 



