



450 DE. F. BUCHANAN WHITE'S 



the reasons given above, there appears to be a constancy of form 

 in Salix rubra, a series of conditions can be found connecting 

 viminaUs and purpurea, the chief grades being sericea, rubra, 

 Forbiana, and Helix (of Smith). 



A Perthshire plant, otherwise intermediate in its characters, 

 has rather remarkable stamens. "Whilst the filaments are usually 

 connate half-way or to near the top, in some of the flowers one 

 or both are divided at the apex — the division being of unequal 

 length, and presenting the appearance of a stamen with 2, 3, 

 or 4 irregular branches. It is to be noted that as these branches 

 form acute and not obtuse angles with the main filament, this 

 does not seem to be a true case of what Hayne has termed 

 cladostemmy. 



X Salix sobdida, Kern. (S. purpurea x S. cinerea.) 



As the name 8. Pontederana, Schleich., is, according to 

 A. Kerner, dubious, having been applied to hybrids of 8. purpurea 

 with several of the Caprece, it appears advisable to use Kerner's 

 name of 8. sordida for the hybrid with S. cinerea. Andersson, 

 indeed, retains the name Pontederana ; but he makes it include 

 the hybrids formed not only with 8. cinerea, but with S. Caprea, 

 8. grandifolia, and S. aurita, since he thinks that there is no sure 

 method of separating them. As, however, he has not united 

 these species, it is scarcely justifiable to unite the hybrids if it is 

 at all possible to distinguish them ; and he himself has kept them 

 separate as varieties. 



Of 8. sordida (whose synonyms are S. sulpurpurea-cinerea, 



Wimme 



W 



v., mvcvuucb i»u uioumcanons, viz. : ±. cinerascens ^iieaic* 



S. cinerea), and 2. glaucescens (approaching S. purpurea, and 

 probably 8. Pontederana of Koch). It is to be noted, however, 



"W 



not tally m every particular; and that, moreover, Wimmer's 

 published specimens do not always altogether agree with his de- 

 scriptions, as, for example, in the length ascribed to the pedicel 



of the capsule. 



In the Woody Island near Perth, where both 8. purpurea and 

 8. cinerea abound, S. sordida appears to be not uncommon. But 

 while forms quite intermediate between the parent species occur, 

 the majority of individuals are in character much nearer S. ci- 

 ~~"~ * L ~~ ° so near, in fact, that in the absence ot 





















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