tree. The early small red flowers and bright yellow fall foliage 
make it worthy of more frequent cultivation [6H]. 
P. persica. Persia (Mr.-Ap.). 
PARROTIOPSIS, Hamamelidaceae. A small tree with beauti¬ 
fully colored leaves in the fall. It has large white flowers but 
our tree has not produced these yet [6H]. 
P. Jacquemontiana. Himal. (My.). 
PARTHENOCISSUS, Vitaceae. Vigorous vines excellent for 
dinging to walls or rambling in partially shaded areas. Very 
subject to Japanese beetle attacks [nursery]. 
P. quinquefolia. Virginia Creeper, Woodbine; Mass, to Fla. and 
Mex. 
P. tricuspidata. Boston Ivy; Japan, C. China. 
P. t. Lowii. 
PAULOWNIA, Scrophulariaceae. P. tomentosa is a large tree 
wtli bold foliage and huge trusses of violet flowers which open 
only in favorable years [7C, nursery]. 
P. Fortunei. China. 
P. tomentosa. Empress-tree; China (My.). 
PERIPLOCA, Asclepiadaceae. A vigorous climber that needs 
a sunny position. The seed pods are similar to those of the 
milkweed [nursery]. 
P. graeca. Silk-vine; S. Eu., W. Asia. 
PEROVSKIA Labiatae. A dense aromatic shrub with gray 
att a J!ns eS h f Ve c S ' ThOUgh dyin S back each year, it generally 
attains a height of approximately 3 feet. It is valued for its 
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