ROSA 



1547 



Rosa is a widespread genus, easily 

 well-marked characters from allied gener 

 limits of the genus itself the characters art 

 variable and it is very difficult to group 



and species the innumerable forms which often pass 

 gradually into each other. In no other genus, perhaps, 

 are the opinions of botanists so much at variance in 

 regard to the number of species. While some, as 

 Bentliam and Hooker, estimate the number at about 30. 



2147. A 9-foIiolate Rose leaf. 



fotr 



ul ulti 



H „e 



Ihe c mnumei il le giiden toims, increas- 

 ing every year aie almost exclusively of hybrid origin 

 and aie therefore omitted m the botanical classification 

 of the genus 



Many attemi til 1 1 le the 



genus with n 1 



important aie 1 1 I 



and Baker N I 1 



Cr^pin is consi lei 1 tl 

 and has been followed ii il 

 good general nionogr | I 1 

 Lindley s Alonogi iphia I 

 short one by Ref,el m is (It 



cations the most important ai 1 

 cially his Pumitise M jnograj 1 i I 

 suiting his pul lications one has t 

 author change 1 his opinim s i 1 

 value f tl e species dm ng hi I 



In hi' 



lat 



he 



r lull 



the specifac valu 



1 and 



III I e for 



luerly consileied as distinct specie An illustiated 

 monograph valuable for the knowledge of the older 

 garden forms and species is Thory and Redouts s Les 



