426 



DR. F. BUCHANAN WHITE'S 





ceptible in all the parts, the derivation from lanata is shown chiefly 



as well. 



organs 



I have some wiilows (from the same locality) under observation 

 which may prove to be forms of Salix Stephania more nearly 

 related to S. lanata than the two described above. 



In Just's Botan. Jahresber. for 1885 a hybrid willow found 

 by Stromfelt (in Iceland ?) is referred to S. herbacea X lanata, 

 n. hybr. f. a. pubescens, Lundstr., and Q. qlabrata, Lundstr. 



13. Salix Lapponum, L. 



Out of & Lapponum, as in the case of many other willows, 

 several supposed species were manufactured in the early times 

 of salicology. Most of these have now been abandoned, though 

 in the British lists three are still retained as varieties, viz.: 

 a. arenaria (L. ex p.), b. Stuartiana (Sm.), and c. pseudo-glauca, 

 Syme (= S. glauca, Sm.). Eegarding these, Boswell-Syme says 

 that in his opinion they are scarcely distinguishable; J. D- 

 Hooker characterizes a and b as only slight varieties, and doubts 

 8. glauca, Sm., being the same species ; and Babington thinks 

 that S. glauca, Sm., is probably not a native, and that it is hardly 

 the same as a and b. 



These varieties are not admitted by the Continental sali- 

 cologists, who, however, distinguish some other forms. Anders- 

 son admits one only— helvetica (Vill.), which Wimmer considers 

 to be a distinct species more allied to S. glauca, L., than to 

 S. Lapponum. "Wimmer ' 



gives two varieties 



ifoli 



(T; 



as 



,, - .__ j .. VWU j iU1Ui - aua c juapnne 

 narrow-leafed glabrous or almost glabrous plant. 



Of the British varieties, a. arenaria and b. Stuartiana have no 

 claim to be maintained as distinct, b differs from a only in the 

 greater woolliness of the leaves, and is probably the same 

 VVimmer's var. b. marrubiifolia, wl: 



As regards S. glauca, Sm., the case is different, as will be 

 explained in treating of the var. or subspecies helvetica (Vill.). 



But whilst no varietal names can well be given, it is not to be 



fl on iorl -flint .O T -i ._ _ ° ... 



leaves 



rang 



in the amount of pubescence. In sha'pe they range from narrowly- 

 lanceolate to roundly-ovate, some of the latter simulating the form 















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