





























KEvrsrcm op the British willows. 429 





reason why it should be doubted), then Salix helvetica must be 

 admitted as a British plant. At the same time it is desirable 

 that it should be rediscovered. 



As regards the figures of Smith's glauca, Wimmer condemns, 

 on the authority of Tausch, Ung. Bot. t. 1810, as representing 8. 

 glauca, L., and though he cites Sal. Wob. t. 68 under that species, 

 he remarks that it is not good, which, as it illustrates a form 

 intermediate between 8. glauca, L., and 8. Lapponum, it could not 

 well be expected to be. Smith cites Haller Hist. t. 14 as well 

 representing his glauca, and Wimmer cites the same under 

 S. helvetica, which affords further evidence of the identity of 

 Smith's species. Smith himself, however, gives 8. helvetica, Vill., 

 as a synonym of S. arenaria y L. ( = #. Lapponum). 



In Europe, whereas 8. Lapponum is both arctic and alpine, 

 S. helvetica is alpine only (Switzerland, Tyrol, and Dauphine). 









■ 



X Salix aurita-Lapponum, Wimm. 



In Edinburgh University Herbarium is an old specimen of 

 a willow collected, I think, by the late Prof. J. H. Balfour, and 

 labelled " Colinton, Edin.," but without a date. It has one $ 

 catkin, and is undoubtedly a hybrid between 8. Lapponum and 8. 

 ourita, both of which species occur, or used to occur, at Colinton, 

 although, as mentioned under that species, it is doubtful whether 

 »• Lapponum is native there. Even if it were planted, that is no 

 reason either for or against the hybrid being of spontaneous 

 origin. There is also a leaf-specimen, collected near Craigcrook 

 »i 1832 by the same botanist, which, from the structure of the 

 leaves, I refer to this hybrid. As stated under & Lapponum, 

 that species has also been found at Craigcrook. 



Andersson combines the hybrids of 8. Lapponum with 8. 

 Vaprea, 8. cinerea, and 8. aurita, under the name S. Lcestadiana, 

 •Hartm., and places S. aurita-Lapponum, 

 2° subaurita. 



Like other hybrids, S. aurita-Lapponum exhibits various com- 

 binations of the characters of its parents, but is best known from 

 its close ally 8. cinerea-limosa, L#stad., by the rugosity of the 



aves » especially the young ones. It occurs in several parts 

 ° f Eur <>pe (Lapland, Sweden, Silesia, Switzerland), and ought to 



e fouud in the Scottish Highlands, where the parent species not 

 ^frequently grow in sufficient proximity. 



UXS ' J OUBN.— BOTACTT. TOL. XXTII. 2 G 



Wimm., as 3 





