196 CRACK WILLOW. ROWAN 



Leaves not silky pubescent 

 nor white. Twigs fragile 

 at the articulations. 



Salix fragilis, L. Crack Willow. Very like S. alba 

 in size and habit, but more cross-branched, and the shoots 

 and leaves not silky. Its name is due to the marked 

 fragility of the twigs, which dislocate at the insertions 

 very easily, a peculiarity not shown by S. alba. 



A A General hue of stem and 

 branches dull slate colour or 

 deep grey. Ridges of the 

 fissured bark not prominently 

 scaly. Leaves not lanceolate; 

 flowers rosaceous, in corymbose 

 inflorescences. Fruits fleshy. 



Z Buds rather large, violet- 

 black with grey pubes- 

 cence; twigs slate coloured. 

 Leaves compound, pin- 

 nate. Fruit scarlet in 

 clusters. 



Pyrus Aucuparia, Gaert. Rowan. The stem is trace- 

 able through the elongated crown. Branches with smooth 

 grey periderm, twigs slightly pubescent. The twigs have 

 a faint unpleasant odour when crushed. The tree shows 

 a great tendency to form suckers below. Flowers and 

 fruit in corymbose cymes. Autumnal leaves yellowish- 

 brown. 



The very similar P. Sorbus, occasionally seen, has 

 similarly brown twigs, and also pinnate leaves, but the 

 bark is browner and more scaly and the buds green, while 

 the fruit is more pear-shaped and olive- brown. The 

 crown is pyramidal. 



Z Z Buds not black nor grey- 

 black, but green or olive; 



