144 HARDY ORNAMENTAL 



Ptelea (Rutaceae), 



Ptblea trifoliata. — Hop Tree, or Swamp Dogwood. 

 North America, 1704. A small-growing tree, with tri- 

 foliate, yellowish-green leaves placed on long footstalks, 

 and inconspicuous greenish flowers. The leaves, when 

 bruised, emit an odour resembling Hops. P. trifoliata 

 variegata is one of the handsomest of golden-leaved trees, 

 and is well worthy of extensive planting. It is preferable 

 in leaf colouring to the golden Elder. Perfectly hardy. 



Pterostyrax. See Halesia, 



Punica (Lythrarieae). 



Ptjnica Geanattjm. — Pomegranate. For planting 

 against a southern-facing wall this pretty shrub is well 

 suited, but it is not sufficiently hardy for the colder parts 

 of the country. Frequently in the more favoured parts of 

 England and Ireland it reaches a height of 14 feet, with a 

 branch-spread of nearly as much, and is then, when in 

 full flower, an object of general admiration and of the 

 greatest beauty. The flowers are of a rich, bright-scarlet 

 colour, and well set off by the glossy, dark-green leaves. 

 P. Granatum rubra flore-pleno is a decidedly ornamental 

 shrub, in which the flowers are of a bright scarlet and 

 perfectly double. They grow satisfactorily in light, but 

 rich, soil. 



Pyrus (Rosaceae). 



Pybus alnifolia. — Japan, 1892. This has ovate, 

 doubly serrated leaves, like those of the Alder, 2 inches 

 or 3 inches long, and corymbs of not very attractive 

 flowers. 



