Some Observations on t he Genus Rubus. 139 



seen it at Glücksburg, but thei-e it seems to be inuch more scanty, than in 

 our country, and not nearly so vigorous as it can be here; it has also a 

 greater number of prickles on the flowering shoots and in the inflorescence, 

 the latter being less Compound, also the leaflets narrower than in the Swedish 

 form. I also reeollect having seen it stated somewhere, that this species has 

 been found in Germany. 



This form does not seem to be rare in England, and the English botanists 

 look upon it as R. umbrosus, Whe. I have myself gathered this form near 

 Hittingdon, in Middlesex, ar Wimbledon, in Surrey, also at Plymbridge, in Devon- 

 shire. Mr. Baker has sent me some specimens of the same form from Chertsey, 

 in Surrey, and Mr. Briggs from several places in Devonshire. 



I eonsider, that I have good grounds for supposing, that the Swedish 

 form has not immigrated to this country either from the Jutlandic peninsula 

 or from England. A more attentive examination of this form at the place 

 where ir principally grows, viz, at Kullen, demonstrates, that it is most typi- 

 cally and strongly developed, wheu it grows in very rieh, damp soil, and is, 

 at rhe same time, exposed to the sea-breezes. On a rather poorer soil, parti- - 

 cularly when it is sheltered from the sea-breezes, it becomes less typical, and 

 approaches R. insularis. Thus intermediate forms between these two species 

 are by no means wanting. I therefore eonsider, that this species has produced 

 R. polyanthemos. All the characteristics that distinguish R. polyauthemos, 

 can also be easily explained from outward eircumstances. In the same propor- 

 tion that the inflorescence is so extremely luxuriant, the flowers and fruit 

 heeoinc small. Also the presence of glandufés, the short-stalked leaves and 

 leaflets, the stronger developement of the latter — are characteristics which are 

 called fdrth by local conditions. The form, growing on the eastern coast of the 

 Jutlandic peninsula, where it is less exposed to the seawinds, is not so cha- 

 racteristic as the Swedish form, and can be regarded as an intermediate form 

 between K. insularis and R. polyanthemos, although Coming nearer the last 

 mentioned specie9. 



L6. R. insularis F. Aresch. Skånes Flora, pag. 570; R. vulgaris.* um- 

 brosus (Whe) Arrh. 1. c. pag. 31; R. villicaulis (Koehl.) Neuman, Kongl. Vet. 

 Akad. Förhandl. 1883, n. 8, pag. 70; R. similatus (P. J. Müll.) Liudeb. Herb. 

 Rub. Scand., n. 13 & 11; R. villicaulis, subsp. insularis Frieder. & Gelert, Rub. 

 exs. Dan. & Slesv. n. 8; turionibus alte arcuatis, angulatis, Bparse pilosis, acu- 

 x leis sparsis, angulis insidentibus, validis, subaequalibus, rectis vel subeurvatis, 



