

















! 





I 







KEVISION OF THE BBITISH WILLOWS. 



415 



ft 



w 



y. acuminata (Sm.). 



ft 



n, Wim 

 Wimm. 



) 



The weak point of this arrangement is that under one specific 

 n?ime (Salix Smithiana) several hybrid plants — having one only of 

 the parents in common — are included. If 8. Caprea, S. einerea, 

 and S. aurila are retained as distinct species — and Andersson did 

 not unite them, — their several combinations with 8. viminalis 

 should necessarily, according to the method adopted by Andersson 

 ln tlle case of other hybrids, have separate recognition. On the 

 other hand, comes the almost unsurmountable difficulty of distin- 

 guishing between them, especially when, as in several cases, the 

 exact parentage has not been proved, and when it is by no means 

 improbable that a second hybridization, either with one or other 

 01 the parents or with a third species, has taken place. For this 

 reason I am inclined to adopt provisionally the following modifi- 

 cation of Andersson' s arrangement:— 

 S. Smithiana, Willd. 

 • stipularis (Sm.). 



fl- sericans (Tausch). 



y- velutina (Schrad.). 



e. 



Before 



ferrugine 

 acuminata (Sm.). 



proceeding to notice each of these varieties, I may say 

 a *» as the result of the study of a very large series of spe- 

 cimens (many of them authentically named), both British and Con- 



a permanence of characters as 



,. • j — "">■"■ uuvucuuuuiiy 



wffl : Uave failed *o And such 



serve to definitely separate one form from another. Certain 



^atnpl es can be, without much hesitation, placed satisfactorily 



n er one or other of the varietal names. There are many, how- 



' nat cannot really be referred to one variety more than to 

 » { n °tner, and which 



saidTh' f ° rm connectin g- link8 - Of some others little more can be 

 than that they are modifications of S. Smithiana. 



combining to some extent the characteristics 









.., a - *tipularie. (Salix stipularis, Sm.) 



■■Sobi • 8tatement 8 iveu above, it will be seen that most of the 

 *bo h r ^tain S. stipularis as a species. 



united the other forms, gives it separate rank. But 



2f2 



Even Andersson, 













■ 





