DESEGLISE ON CLASSIFICATION OF SPECIES OF ROSA. 293 



proposed to make a new genus for it, under the name of Hulthemiay ought 

 certainly to be included in a separate section, on account of its simple 

 leaves, and want of stipules. The section includes 32 species, of which 

 the following seven only belong to the French Flora ; — li. Gallica, L., H. 

 clnnamomea, L., B. aristata, Laj^ey, B. fraxinifolia, Borkh,, U. cglanteria, L., 

 a. pimplnelUfolia, L., U. ruhrifolia, Vill. It is always desirable, as far as 

 possible, to preserve analogies in a series of species, but in this section of 

 Seringe the contrary is the case. iv. CANiNiE. " Styli liberi inclusi vel 

 exserti. Sej^ala pinnatifida post anthesim deflexa ssepissimse deciduse. 

 Fructus ovatus raro globosus. Stipulse adnatse cum foliis deciduse. 

 Aculei sparti non stipulares." Seringe loc. cit., p. 611.^ This section 

 comprises 39 species, of which nine belong to the Flora of France, viz. : — 

 R. alpina, L., M. canina, L., B,. saxatiUs, Stev., R. hcdtica, Roth., 2?. ruhigl- 

 nosa, L., R. tomentosa, Sm., R. cuspidata, Biel,, R. viUosa, L., and R. alba, L. 

 R. alpina with its stems without prickles and entire calyx divisions, is 

 wrongly placed here, after the characters on which Seringe bases the sec- 

 tion : the same may be said of R. fastigiata, Bast., which has the styles 

 united in a column, and which Seringe only gives as a variety oiR.canina, L. 

 R. Baltica is nearer Pi. cinnamomea than the Caninse. This section is 

 very much confused on account of the want of connection amongst the 

 species it comprises, and which seem naturally to refuse so forced and 

 inharmonious a union. Duby, Botanicon Gallicum (1828), Lorey and 

 Duret, Flore de la Cote d'Or (1831), adopt the sections of Seringe in their 

 divisions of the genus Rosa. 



Walbroth, " Historia Rosarnm " (1828) divides the genus into two sec- 

 tions, after the calyx divisions. 1st entire, and 2nd pinnatijid. Walbroth 

 only admits for all the roses known at this period, 24 types, under which 

 he places as varieties more than 500 species : his work presents us with 

 only an incoherent assemblage of incongruities and badly applied synonyms. 

 Loiseleur-Deslonchamps flora gallica (1828) follows the divisions of Wal- 

 broth. These sections, which seem natural at first sight, cannot be 

 admitted, for they present the same anomalies in the connection of the 

 species, as divisions established upon a single character. 



Reichenbach, '\Flora Germanica ea^cursoria" (1830) makes two grand 

 sections, according to the form of the prickles of the young shoots : — 



(8) A genus named in honour of Ch. van Hultbera, founder of the botanical 

 garden at Ghent. 



(9) This section includes the Villosae and Centifolise of the Musee Eelvetique. 



