DESEGLISE ON CLASSIFICATION OF SPECIES OF ROSA. 275 



the larger sections. Thus according to this method we find in the same 

 group, Ti, arvemis, Huds.; R. r/cmiuata, Rau ; 'R.pnmiln, L. ; 7^. dmiamomca, 

 L. ; B.. aJpina, L. ; R. spinosisslma, L. ; 7i. collina, Jacq. ; and R. canina, L. ; 

 species ditiering widely from one another in their habits, styles, prickles, 

 leaves, and calycinal divisions. 



Leman, " Bulletin de la Soc. PhilomatiqKc," 9th May, 1818, divides 

 the roses into three sections after the form of the serration of the leaves. 

 The first section " FoUoles slmpllciter dentatis," places R. dwnetorwn, Thuil., 

 alongside R. cinnamomea, L., two species differing much in their leaves, 

 prickles, bracts, and calycinal divisions : R. spinosissima, L., figures badly 

 at the side of R. Bengalensis, Pers. Is Pi. ruhrifolia,Y\\\., well placed between 

 R. leiicochroa, Desv., with united styles, and R. canina, L. ? In the second 

 section •' Dentibus foliorum marglne inferiore serratis," R. vei-ticillacantha, 

 Mer., comes between R. Gallica, L., and R. alpina, L,, three species which 

 have no bond of union whatever ! R. eglanteria, L., is in this section 

 placed with R. hiserrata, Mer. The third section *' Dentibus foliorum utrin- 

 que margine serratis glandulisve," if it included only the rubiginosce would be 

 sufficiently natural. 



De Candolle in 1818 proposed in the "Musee Helvetique, of Seringe,* 

 a general classification of the roses then known, under the following eleven 

 sections: — a, Synstyl^e; b, Rubigina3; c, Gallicanes; r/, Chinoisse ; e, Canellas; 

 /, Hebecladics : g, Pimprenellae ; h, Villosse ; i. Centifoliae ; j, Caninfe ; /.-, 

 Eglanterse. These sections were adopted by Besser, enumerat. plant. Void 

 and Fad. (1822). 



Thort, *' Prodrome de la Monographie du genre Rosier" (1820) makes five 

 grand divisions, subdivided into 27 groups; several of which are composed 

 of species altered by cultivation. The five divisions are all artificial and 

 without any connecting bond, whilst the groups are established upon 

 characters of little importance, and often include but a single species. 



Lindley in 1820 brought out his monograph of the Roses, of which 

 a translation by de Pronville was published in French in 1824. He divides 

 the species of the genus 2tos« into eleven sections^ — i. S[mplicifolij2, 

 established with good reason for R. berberifolia, Pall. ii. Feroces. 



(4) In spite of numerous searches I have been unable to obtain this pamphlet by 

 Seringe ; and not being acquainted with the chiiracters on which these divisions are 

 founded, I simply give their names without any remarks upon them. 



(5) Not having the work of the English botanist in my possession, I quote tho 

 sections from de Pronville' s translation, and upon this my criticisms are founded. 



