P. JAPONICA (_syn Cydonia japonica_).--Japanese Quince. Japan, 1815. This is one of the commonest of our garden shrubs, and one that is peculiarly well suited for our climate, whether planted as a standard or as a wall plant. The flowers are brilliant crimson, and plentifully produced towards the end of winter and before the leaves. Besides the species there are several very fine varieties, including P. japonica albo cincta, P. japonica atropurpurea, P. japonica coccinea, P. japonica flore-pleno, P. japonica nivalis, a charming species, with snowy-white flowers; P. japonica rosea, of a delicate rose-pink; and P. japonica princeps. P. japonica cardinalis is one of the best of the numerous forms of this beautiful shrub. The flowers are of large size, of full rounded form, and of a deep cardinal-rose colour. They are produced in great quantity along the branches. A well-grown specimen is in April a brilliant picture of vivid colour, and the shrub is sooner or later destined to a chief place amongst our ornamental flowering shrubs. P. japonica Maulei (_syn Cydonia Maulei_), from Japan (1874), is a rare shrub as yet, small of growth, and with every twig festooned with the brightest of orange-scarlet flowers. It is quite hardy, and succeeds well under treatment that will suit the common species. P. PRUNIFOLIA.--Siberia, 1758. Whether in flower or fruit this beautiful species is sure to attract attention. It is a tree of 25 feet in height, with nearly rotundate, glabrous leaves on long footstalks, and pretty pinky-white flowers. The fruit is very ornamental, being, when fully ripe, of a deep and glowing scarlet, but there are forms with yellow, and green, as also striped fruit. P. RIVULARIS.--River-side Wild Service Tree. North-west America, 1836. A native of North America, with terminal clusters of white flowers, succeeded by sub-globose red or yellow fruit, is an attractive and handsome species. The fruit is eaten by the Indians of the North-west, and the wood, which is very hard and susceptible of a fine polish, is largely used in the making of wedges. It is a rare species in this country. P. SINICA (_syn P. sinensis of Lindley_).--Chinese Pear Tree. China and Cochin China, 1820. Another very ornamental Crab, bearing a great abundance of rosy-pink or nearly white flowers. It is a shrub-like tree, reaching a height of 20 feet, and with an upright habit of growth. Bark of a rich, reddish-brown colour. It is one of the most profuse and persistent bloomers of the whole family. P. SINENSIS (_syn Cydonia chinensis_).--Chinese Quince. China, 1818. This is rarely seen in cultivation, it having, comparatively speaking, few special merits of recommendation.