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namely a. Salix Trevirani, Spreng., b. S. hippophaifolia , ThuilL, 

 and c. 8. mollissima, Ehrh., it will be found that they differ from 

 each other chiefly in the amount of pubescence of the various 

 parts, and in the structure of the catkins and capsules, a and 

 b being nearer triandra, and c nearer viminalis. (Here it 

 may be remarked that Andersson's and Wimmer' s descriptions 

 are not in exact agreement in every particular, nor Wimmer's 

 with his published specimens.) 



Through the kindness of the Rev. Augustin Ley and Dr. 

 Fraser, I have seen a series of a willow found by them in Here- 

 fordshire and Staffordshire respectively, distributed under the 

 name of "Salix hippophdefolia, ThuilL," and doubtless the plant 

 meant by the "S. triandra c. Trevirani (Spreng.)," of the ' London 

 Catalogue/ * 



Whilst Dr. Fraser has found, near "Wolverhampton, one c? 

 bush only, Mr. Le) r reports that the willow found by him is 

 tolerably common on the lower course of the Wye in Hereford- 

 shire, where it is almost uniformly androgynous, though purely 

 male plants do occur. The specimens of the latter which he has 

 sent to me are practically identical with Dr. Fraser's examples, 

 except that perhaps these are a little more pubescent. Comparing 

 them with Wimmer's specimens, I think that, although they do 

 not quite exactly agree, yet they belong rather to a. Trevirani 

 than to b. hippophdefolia. 



Mr. Ley's androgynous examples are much more difficult 

 to place ; for though, as regards the leaves, they are perhaps 

 nearest Trevirani, in catkin structure they vary a good deal, 

 some being near Trevirani, and others near mollissima, but none 

 of them agreeing with Jiippophaefolia as defined by Wimmer. 

 They seem, in fact, to connect Trevirani and mollissima without 

 touching on Jiippophaefolia, and show that triandra-viminalis 

 includes more forms than those described by Wimmer or by 

 Andersson (under multiformis). 



In addition to the specimens mentioned above, I have seen 

 examples of a willow collected by Mr. A. Brotherston at 

 Carham, in Northumberland, which fits b. hippophdefolia. Con- 

 sidering that both S. triandra and S. viminalis are common British 

 species, it seems not impossible that hybrids between them may 

 e of more common occurrence than is at present supposed, 



. , ma ^ ** ment i°ned that both Andersson and Wimmer use " hippophai- 

 Mt*,* 9 and some other botanists " Jiippophaefolia" to denote Thuillier's plant 



L ar. ed. ii. 514], and that the name hippophaifolia has been employed for 

 both a and b. 









