Deciduous Trees 
POPULUS, continued 
P. monilifera; syn., Carolinensis. Carolina Poplar. (Mr) A quick¬ 
growing variety with gray-green bark and bright green, heart-shaped foliage. 
A desirable variety for screening unsightly buildings and for temporary plant¬ 
ing to secure immediate effects. 
P. monilifera, var. Van Geertii. Van Geert’s Golden Poplar. (M r) 
A form of P. monilifera , with bright golden yellow foliage, holding the color 
well throughout the season. 
P. nigra, var. fastigiata. Lombardy Poplar. ( L r) A well-known Italian 
variety. An upright and extremely rapid grower, with small bright pale green 
leaves, lighter beneath. Valuable for formal work in connection with build¬ 
ings or gardens, and an excellent avenue or lawn tree. In the latter case its 
tall, spiral form tends to break and relieve the rounded outlines of other trees, 
which are likely to be in the majority in such planting. (Sec plate on page 54.) 
PRUNUS (See, also, Cerasus) 
P. Pissardii. Purple-leaved Plum. (S s) One of the most beautiful 
hardy trees, and an ornament to any lawn from spring until late fall. During 
May it is covered with blush-pink blossoms, which harmonize exquisitely with 
the pinkish purple foliage of early spring. The purple foliage, not being 
affected by the hot sun, deepens during the summer months and retains its 
color late in November. 
P. triloba. Flowering Plum. (S s) A desirable variety, usually grafted 
on stems 5 to 6 feet in height, and used as a standard. Sec, also, Shrubs. 
PTELEA. Hop Tree 
Very choice lawn trees of small size, with handsome deep green, glossy trifoliate 
leaves, which, if bruised, exhale a pleasant, hop-like odor. This odor is especially 
noticeable in the seeds, which are borne in dense, showy clusters in late summer. 
They are of easiest culture in any soil. The Golden variety is an introduction of 
the first merit. 
P. trifoliata. Hop Tree. (Ds) A round-headed, loosely branched tree, 
with glossy green foliage ; adorned in the fall with numerous clusters of light 
green fruit-pods. Prefers a shaded position and moist soil. 
P. trifoliata, var. aurea. Golden Hop Tree. (Ds) One of the showiest 
golden-foliaged trees in cultivation. The peculiar glossy surface of the foliage 
gives an appearance that the leaves have been varnished. It is one of the 
highest colored golden-foliaged plants, retaining its color all summer. White 
flowers in June. 
PTEROSTYRAX 
P. hispidum; syn., Halesia hispida. (Sm) An open-headed tree with 
slender, spreading branches, bearing long racemes of white flowers in June. 
P. hispida ; syn., Halesia. A very showy, open-headed tree with light 
green foliage, and bearing in June drooping panicles of fragrant white flowers, 
resembling those of the deutzia. 
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