HARDY ORNAMENTAL TREES AND SHRUBS. 



311 



20 feet high in the Knap Hill Nursery. North America, 

 1752. 



Ozothamnus rosmarinifolius, Snow in Summer (fig. 

 380). — A shrubby Composite with long arching branches 

 clothed with small Rosemary-like leaves, and bearing in 

 summer dense clusters of white Daisy-like flowers. Re- 

 quires the protection of a wall, except in the south and 

 west. Tasmania. 



P^eonia Moutan. — This, the Moutan or Tree Pseony, is 

 one of the showiest of spring or early-summer flowering 

 shrubs. The greatest drawback to its cultivation in 

 Britain is its liability to damage by spring frosts, and it 

 frequently succeeds better in cold districts, where it starts 



late into growth, than in warmer localities. It makes 

 a rounded bush 5 feet or more high, thriving best in a 

 rich loam. In the type plant the flowers are pink, but in 

 the numerous varieties the colours vary from pure-white 

 to rich-purple. China, 1787. 



Paliurus aculeatus, Christ's Thorn. — A dwarfish, 

 densely-branched, spiny shrub, with three-nerved leaves, 

 greenish-yellow flowers, and curious orbicular winged 

 seed-vessels. Palestine, &c, 1596. 



Parrotia Jacquemontiana is a hazel-like small tree, 

 remarkable for the large white bracts which surround the 

 flowers, but is not so useful as the other. Kashmir. 

 P. persica. — A handsome, hardy, small tree, still rare 

 in gardens. Its yellowish flowers are not 

 particularly showy, but its oblong simple 

 leaves are very striking when they as- 

 sume their brilliant autumnal tints 

 of orange and scarlet. Northern 

 Persia, 1848. 



Passiflora ccerulea. — 

 The Passion - flower is 



Fig. 380.— Ozothamnus rosmarinifolius 

 (Snow in Summer). 



hardy in the south and west, fruiting freely in 

 warm summers. It is at the same time one of 

 the most beautiful climbers we have for train- 

 ing up house-fronts, &c. The young wood 

 may be cut back annually after the flowering season is 

 over. There are, besides the typical form, several varie- 

 ties, and two or three hybrids nearly as hardy. The 

 variety Constance Elliot is a charming climber, with white, 

 fragrant flowers. Uruguay, South America, 1699. 



Paulo wnia imperialis. — A distinct deciduous tree 

 about 40 feet high, with very large cordate leaves, and 

 terminal panicles of purplish - violet, spotted, fragrant 

 flowers, which rarely expand in this country, as they are 

 formed in the autumn, and are usually injured by the 

 winter frosts. It is rather tender for most situations, 

 especially when young. It is sometimes grown as a fine- 

 foliage plant in beds, each plant being restricted to a 

 single stem and cut back to the ground every winter. 

 Thus treated its leaves are as much as a yard long. Japan, 

 1840. 



Periploca grceca. — A perfectly hardy tall twining 

 shrub, with simple lanceolate leaves, and long -stalked 

 clusters of brown and green hairy flowers of unpleasant 

 odour. It is a handsome shrub, useful to clothe a wall 

 or other place where its foetid smell is not likely to offend. 

 It flowers in July and August. South Europe, 1597. 



Pernettya. — An American genus of dwarf evergreen 

 shrubs, with small dark -green rigid leaves and white 

 flowers, succeeded by berries of various colours, which are 

 very ornamental in winter. They thrive best in a peat 

 soil or light loam, and flourish in the neighbourhood of 

 the sea. 



P. mucronata. — The species most commonly seen in 

 gardens, the others differing from it only in minor details. 



It is a bush from 3 to 4 feet high, the round berries 

 ranging in colour from pure-white to deep-red. Strait of 

 Magellan, 1828. 



Persica Davidiana. — The earliest to flower of the 

 Peach and Almond groups, being frequently in bloom in 

 February. It is a small tree with narrow serrated leaves 

 and white or rosy flowers. China. 



P. vulgaris (Amygdalus Persica), the Peach. — This, 

 the type from which the well-known fruit-tree has been 

 derived, has many beautiful varieties, some having flowers 

 red or white, single or double, others with purple or varie- 

 gated leaves. Eastern Asia, 1562. 



Philadelphus (the Syringa of gardeners). — Handsome 

 shrubs, with simple leaves, and showy, white, highly 

 odoriferous flowers. They will succeed in almost any soil. 



P. coronarius, Mock-Orange. — An erect-growing species 

 from 6 to 12 feet high. Flowers scarcely so large as in 

 some of the following, but appearing earlier in May. 

 There is a yellow-leaved variety, and also one with double 

 flowers. South of Europe, 1596. 



P. Gordonianus. — An American species, with flowers 

 nearly double the size of the foregoing, and not appearing 

 before the end of June or beginning of July. 1823. 



P. inodorus. — This has large scentless flowers and 

 quite entire leaves; it has been in cultivation since 1738, 

 and is a native of North America. 



P. latifolius, including speciosus, grandillorus, &c. — 

 Leaves hairy when young. Flowers large, very sweet- 

 scented, appearing in June or July. North America, 

 introduced about 1800. 



