398 71. AMENTIFER^. 



Descends to the sea level, in East Highlands. 



Ascends to 50 yards, less or more, in Thames ? 



Range of mean annual temperature 49 — 47. 



Native. Sylvestral ? This is totally unknown to me, 

 beyond the name and descriptions in books. The distri- 

 bution is given above in accordance with the localities re- 

 ported ; but there is too much reason to fear that the 

 counties of Middlesex (Mr. Joseph Woods) and Norfolk 

 (Mr. Crowe) are erroneous. 



1015. Salix BicoLOR, Ehrh. ^ /'^■^^jf- fff^^ 



Area * ^ 3 4 * 6 * * * 10 11 12 13 * 15 16. 



South limit in Sussex ? Surrey ? Herts .? Caermarthen ? 



North limit in Moray, West Inverness, 



Estimate of provinces 9. Estimate of counties 20. 



Latitude 51 — 58. Scottish (.?) type of distribution. 



A. A. regions. Inferagi'arian — Midarctic zones. 



Descends to the coast level, or nearly so, in England. 



Ascends to 800 yards, less or more, in East Highlands. 



Range of mean annual temperature 49 — 39. 



Native. Rupestral, &c. Similar difficulty or distrust 

 occurs with respect to the southern counties on record for 

 this species or group, as was above mentioned under that 

 of S. nigricans. I have never seen in the southern pro- 

 vinces of England any willows which I could identify sa- 

 tisfactorily with those of the glens and mountain rocks of 

 Scotland, passing under one or other of the various names 

 placed under No. 1015 (S. bicolor) in the London Catalogue 

 of British Plants. And hence, as in too many other in- 

 stances, I am compelled for the present to give the distri- 

 bution of names from books, rather than Nature's true 

 distribution of these willows themselves. 



