BOTANICAL SYNOPSIS 163 



P. tremula L. Aspen. Branches becoming pendulous. 

 Shoots downy, reddish. Buds slightly viscid. Leaves silky 

 beneath when young ; those on the suckers heart-shaped ; 

 those on the branches rounded, with incurved teeth. March, 

 April. Europe, North Asia, Asia Minor, and North Africa. 

 Vol. II, p. 121. 



P. pyramidalis Roz. Lombardy Poplar. Branches as- 

 cending. Shoots smooth. Buds viscid. Leaves rhombic, 

 ciliate, and silky beneath when young ; but more rounded, 

 finely serrate, and smooth when older. Suckers. March, 

 April. Probably native in Western and Northern Asia. 

 Vol. III., p. 73. 



Salix fragilis L. Crack Willow. Branches smooth, yellow- 

 brown, brittle in spring. Leaver elliptic-lanceolate, pilose 

 when young, afterwards smooth, three to six inches long, 

 with semi-cordate deciduous stipules. Flowers in dioecious 

 erect catkins, appearing with the leaves and with leaves on 

 the flower-stalks. Catkin-scales not notched, linear-lanceo- 

 late. Stamens two, distinct, hairy below. Capsules stalked, 

 with bifid but not recurved stigmas. April, May. Native 

 in South-west Asia, but doubtfully so in Europe. Intro- 

 duced in America. Vol. III., p. 26. 



S. decipiens Sm. Orange Willow. Similar to the above, 

 but with polished orange or reddish brown branches, crimson 

 when young, smaller leaves, and longer styles. Vol. III., p. 29. 



S. Russelliana Sm. Bedford Willow. Very similar to 

 S. fragilis, but with smooth green flexible twigs and long 

 tapering leaves, very glaucous beneath. Vol. III., p. 29. 



S. Babylonica L. Weeping Willow. Branches drooping, 

 pale green, very slender, slightly twisted at each node. 

 Leaves lanceolate-acuminate, finely serrate, five inches long 

 and one inch across, smooth above and glaucous beneath. 

 Otherwise like S. fragilis. Extra-tropical Asia, from Japan 

 to Armenia and Syria, and North Africa. Vol. III., p. 

 145. 



S. alba L. White or Huntingdon Willow. Bark deeply 

 furrowed. Branches silky, olive green. Leaves narrowly 

 lanceolate-acuminate, convolute, silky on both surfaces, two 



