356 APPENDIX 



B. CLASSIFICATION OF WILLOWS WHEN </ CATKINS 



ALONE ARE AVAILABLE. 



(1) Stamens five or occasionally more, hairy at 

 the base ; two glands in each $ flower. Petiole 

 glandular. 



Salix pentandra, p. 211. 



(2) Stamens fewer than five. 



(a) Stamens three, glabrous ; two glands in each 

 <? flower. Petiole glandular. 



Salix triandra, p. 213. 



(b) Stamens not more than two. 



(i) Stamens two, as shown by the 4 anther- 

 lobes ; but so closely fused as to appear 

 one ; hairy at the base. One gland only 

 to each g flower. Many of the leaves 

 opposite. 



Salix purpurea, p. 216. 



(ii) Stamens two, free. 



(a) Glands two in each </ flower ; scales 

 concolor or nearly so, and caducous; 

 catkins stalked. 



* Stamens hairy ; catkins lateral, large, 

 2050 x 612 mm., with leafy stalk; 

 leaves lanceolate. 



t Leaves silky pubescent ; tree not weeping. 

 Salix alba, p. 211. 



ft Leaves not silky. 



Branches pendent. 

 Salix Balylonica, p. 209. 



