FLOWERING TREES AND SHRUBS 145 



P. AMERICANA (syn Sorbus americana). American 

 Mountain Ash. This species, a native of the mountains 

 of Pennsylvania and Yirginia (1782), is much like our 

 Rowan Tree in general appearance, but the bunches of 

 berries are larger, and of a brighter red colour. 



P. ANGUSTIFOLIA. North America, 1750. A double- 

 flowered crab is offered under this name, of vigorous 

 growth, bearing delicate pink, rose-like flowers that 

 are deliciously fragrant, and borne contemporaneously 

 with the leaves. The merits claimed for the shrub are 

 perfect hardihood, great beauty of blossom and leaf, 

 delicious fragrance, and adaptability to various soils. 

 The single-flowered form extends over large areas in 

 the Atlantic States of North America. They are very 

 desirable, small-growing trees, and are described by 

 Professor Sargent as being not surpassed in beauty by 

 any of the small trees of North America. 



P. ARIA. White Beam Tree. Europe (Britain). A 

 shrub or small-growing tree, with lobed leaves, covered 

 thickly on the undersides with a close, flocculent down. 

 The flowers are small and white, and produced in loose 

 corymbs. It is a handsome small tree, especially when 

 the leaves are ruffled by the wind and the undersides 

 revealed to view. The red or scarlet fruit is showy and 

 beautiful. 



P. AUCUPARIA. Mountain Ash, or Rowan Tree. Too 

 well-known to need description, but one of our hand- 

 somest small-growing trees, and whether for the sake of 

 its dense corymbs of small white flowers or large bunches 

 of scarlet fruit it is always welcomed and admired. 

 P. Aucuparia pendula has the branches inclined to be 

 pendulous; and P. Aucuparia fructo-luteo differs from 

 the normal plant in having yellowish instead of scarlet 

 fruit. 



P. BACCATA. Siberian Crab. Siberia and Dahuria, 

 1784. This is one of the most variable species in 



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