TREES OF UPRIGHT HABIT 



nated on the estate of my friend Mr. F. R. S. Bal- 

 four at Dawyck, Peebleshire, Scotland, and is now 

 50 feet tall. It is an old tree with dense, quite up- 

 right branches and is a striking contrast to the type. 

 The propagation of this fastigiate Beech has recently 

 been taken up by European nurserymen, and young 

 plants in the Arnold Arboretum are doing well. 



The European Crataegus monogyna, a Haw- 

 thorn, has produced two varieties with upright 

 branches. One (var. strida) is a tree with a broad 

 crown and bears dull red fruit; the other (var. monu- 

 mentalis) is a narrow and strictly pyramidal plant, 

 and is a recent acquisition to our collection. In some 

 European nurseries there is grown a fastigiate form 

 of the common Horsechestnut {A e senilis Hippoeas- 

 tanum var. pyramidalis) but I have not seen this 

 tree. 



Besides the Lombardy there are two other Poplars 

 that have erect branches. One of these is Popidus 

 alba var. pyramidalis, better known as P. Bolleana. 

 This form of the White Poplar is a native of central 

 Asia and was introduced into Europe and this 

 country about forty years ago. In habit it is as 

 fastigiate as the Lombardy Poplar, and it exhibits 

 much variation in shape of leaves which are white on 

 the underside. The second Poplar is known as P. 

 thevestina and though in habit and foliage it is simi- 

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