40. K. CORYLIFOLIUS. 271 



coryUfolius a suhlustris. Arrhenius states that tlie petioles 

 of his R. coryUfolius are furnished with straight prickles, 

 whilst those of R. pruinosus are hooked : our R. coryUfolius 

 has them of both forms, even sometimes upon the same 

 petiole. I think that our R. coryUfolius is identical with 

 that of Sweden, and I judge on this question also from the 

 specimen communicated to Fries' Herb. Norm. (vii. 48), 

 and Danish specimens from Mr Lange. 



R. thamnocharis (Mlill.) is probably identical with this 

 variety, but approaches slightly to var. (3 conjungens; there 

 I also place the R. discoideus (Miill. !) and R. acantliopliorus 

 (Mull. !). 



Some remarks upon the plants now combined to form 

 R. coryUfolius will be found under R. althceifolius and R. 

 Balfourianus. It is a variable species ; yet all its forms 

 have a common look, which it is perhaps impossible to 

 describe. 



There can be no doubt that the plant intended by Smith 

 was (typically) our R. coryUfolius, although he probably in- 

 cluded others under the name which are not now considered 

 as correctly placed there. In the Flora Britannica he de- 

 scribed the calyx as " maturascente fructus inflexus," on the 

 authority of Mr Wigg; but corrected the mistake in English 

 Botany (f 827). 



M. Genevier refers specimens to the R. MougeoU (Bill.), 



There is a specimen in Billot's Flora Gall, et Germ. 

 exsiccata (No. 763), which is named '^R. Wahlbergii (Arrh., 

 non Godr. Mon.) Gren. et Godr. Fl. Fr." and also stated to 

 be the R. dumetoruni a vidgaris of the Ruhi Germanici (t. 

 45. A. t 1). If placed by the side of that plate the differ- 

 ence between the plant and the figure will be seen to be 

 very great. I am quite willing to believe that it is the R. 

 Wahlbergii of the Flora de France, although the authors of 

 that work quote the above figure from the Rubi Germanici. 



