

I 







* 



REVISION OF THE BRITISH WILLOWS. 453 



from living specimens : — Bush about 18 inches high. Bark of 

 the twigs shining brownish green, of the shoots redder and 

 slightly downy. Some of the upper leaves subopposite, after 

 the manner of Salix purpurea. Leaves dull, rather dark green 

 with white hairs above ; below dull pale green, with more copious 

 long white hairs ; margin cartilaginous, slightly incurved, very 

 finely and remotely serrate, with reddish glands ; veins pellucid, 

 the chief veins impressed on the upper surface and raised on the 

 lower. In shape the leaves are similar to those of the S. pur- 



growing 



Sal. Wob. t. 85). Catkins ( 2 ) rather old, lateral, on a peduncle 

 having three or four small leaves. Scales ovate spathulate, 

 rounded at the apex, upper half black, with long white hairs. 

 Ovary ovate conic, blunt; style distinct, though short; stigmas 

 very short, thick, and rather broad, semi-bifid; ovary white 

 pubescent, on a pedicel about as long as the linear pale yellow 

 nectary. 



Though the $ plant ouly has been found in Britain, both 

 sexes are known in Central Europe, where S. Doniana is widely 

 distributed. Andersson mentions four forms or varieties, viz. 

 a. latifolia, fi. Ungulata, y. linearis, 3. leiocarpa. Wimmer de- 

 scribes six forms, but does not give them names. The filaments 

 of the e flowers are connate at the base only, or for a third or 

 half their length. 



DESCRIPTION OP THE PLATES 



Plate IX. 



A diagrammatic statement of the different views regarding ^^^ 



British Willows held at various periods between ^ - ^ 



The dates given are those of the publ.cat.on of toe Wor^ ^^ 

 representing the views of the period (see ^ J- ^.^ 



columns indicate the nnmber of numbered «P^ 1C8 « 8ljadpd 



into three portions-dark, medium, and light 1. ^ 



portion shows the number of true species; he me 

 number now recognized as hybrids ; and the hgbt shade 



Britain. 

 L INtf. JOURN. 



pposed to be species, but now ™ n8ldere ° 



forma or to have no claim to be admitted as »^J" 

 uvs* column is given the estimate for 1890 of the true £*££ 

 shaded) and of the hybrids (medium shaded) winch have been found 



BOTANY 



21 











t 



