







430 DB. F. BUCHANAN WHITE* S 



A willow, in Kew Herbarium, collected by Lightfoot, but 

 without locality, date, or name, seems to be Salix aurita-Lap- 

 ponum. 



X Salix cinerea-limosa, Lees tad. (S. Lapponum X 8. 

 cinerea.) 



A specimen, in Edinburgh University Herbarium, labelled 

 " Salix cinerea, Carlowrie, 1838 " by, I think, J. H. Balfour, is 

 evidently a hybrid of S. Lapponum, and is very like S. aurita- 

 Lapponum. From the densely black- pubescent twigs, the 

 abundant rusty cinerea-\ike hairs on the underside of the leaves, 

 and the absence of the rugosity of aurita, it is most probably a 

 hybrid with S. cinerea rather than with S. aurita. The specimen 

 has numerous $ catkins, but only young leaves. 



Carlowrie is near Edinburgh, and though there is no record of 

 8. Lapponum having been found, it may have been planted there 

 as well as in the other places in the district. The hybrid itself 

 is not at all likely to have been introduced, but rather to have 

 had a spontaneous origin. 



W 



fi- 



of rare occurrence, recorded from North Scandinavia only . It 

 is not so likely to occur on our hills as S. aurita- Lapponum. 



X Sali s sruBii. {Schleich.), WilU. (S. Lapponum x S. Arbus- 

 cula.) 



^ Since 8. Lapponum and 8. Arbuscula are (with the exception of 

 8. herbacea) probably the two commonest ol our alpine willows, 

 they, as might be expected, cross with each other, though, on the 

 Continent at least, apparently uot so frequently as might be 

 supposed. Toe hybrid, though at first at least not recoguized as 

 such, has been known for a considerable time under the name 

 of S. spuria, Schleich., Willd. ; but Wirnmer, according to his 

 custom, altered the name to 8. Lapponum- Arbuscula. It occurs 

 both in Switzerland and the Tyrol, but, judging by its absence 

 from many herbariums, seems to be rare. In Britain, though it 

 is about seventy years since it was first gathered, it has not, 

 until quite recently, been identified, having usually been passed 

 over as a form of 8. Arbuscula. 

























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