44 KEY FOR THE IDENTIFICATION OF TREES AND SHRUBS 



18. Leaf broad-lanceolate, 

 upper surface dark 

 green, shining, small 

 swellings: glands on 

 edge of leaf -stalk: 

 vetiole. See #21. 

 Bay-leaved Willow 

 Salix pentandra L. 

 18. Leaf medium-lanceolate, 

 dark green above, paler 

 beneath, marginal teeth 

 glandular. 

 Crack Willow 

 Salix fragi lis L. 

 18. Leaf medlum-lanceloate, 

 green above, paler be- 

 neath, not glandular. 

 Purple Willow 

 Sal ix purpurea L. 

 18. Leaf slender-lanceolate, 

 tapering at both ends, 

 sharply serrulate, 

 branches drooping. 

 Weeping Willow 

 Sal ix babylonica L. 

 18. Leaf slender, ob- 



lanceolate: broader at 

 tip, serrulate, pale be- 

 neath. 

 Smooth Willow 

 Salix discolor Muhl . 

 18. Leaf narrow-lanceolate, 

 rolled edge, silvery- 

 silky beneath. 

 Basket Willow 

 Sal ix vimlnalts L. 

 19. Leaf symmetrical: the two sides 



similar in outline 20 



19. Leaf unsymmetrical: the two sides 



unlike in outline 37 



20. Small swellings: glands on the 



petiole. See '#90 21 



20. No glands on the petiole .... 22 

 21. Two reddish glands on 

 petiole just below the 

 blade, leaf lanceolate, 



