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A tree 20 to 50 ft high, forming a rounded, wide-spreading head of branches, the lower ones arching or pendulous at the extremities; trunk 1 to 2 ft in diameter. Leaves 11⁄2 to 31⁄2 in. long, about half as much wide, oval or ovate, rounded or tapering at the base, acute or acuminate at the apex, finely and shallowly toothed, glabrous and glossy green above, paler and glabrous beneath; leaf-stalk slender, glabrous, about two-thirds the length of the blade. Flowers white, produced during April in umbels, each flower 11⁄2 in. across and borne on a slender stalk 1 to 11⁄2 in. long. Calyx-tube and calyx-lobes glabrous, the lobes longer than the tube, lanceolate. Fruits about 3⁄8 in. thick, globular, bright red or yellow, slightly hollowed at the base and with a round scar but no calyx-teeth at the top.
Widely spread in nature, this species in its typical state ranges from E. Siberia eastward to the Pacific and southward to Mongolia, N. China, and Korea; but plants from S.W. China and the Himalaya, usually referred to var. himalaica, scarcely differ from the type. It is said to have been introduced to Kew in 1784. In fact, plants were being offered in the London nurseries earlier than that, but whether they were the true species is not known. Indeed the true species has never been common in gardens, most of the trees grown as Malus baccata until recently being forms of M. × robusta (see below). It was reintroduced by Farrer from Kansu under numbers 398 and 778 (the latter grown wrongly as M. theifera).
cv. ‘Gracilis’. – This crab, highly praised by the late Dr Wyman, was given a three-star rating in the Dutch trials, but seems to be scarcely known in Britain. For its pendulous habit to be developed, it has to be grafted on a high stem.
There are now young trees at Kew of both the species and var. mandshurica, raised from seeds collected in south Korea by Beyer, Erskine and Cowley in 1982. One of these was planted October 1986 to commemorate the completion of the Centre for Economic Botany by the Thames, which is due to be opened to the public in 1988.
Pyrus b. var. himalaica Maxim
Pyrus baccata var. mandshurica Maxim.
Leaves with small, distant teeth, or even entire in the lower half, downy beneath when young; petiole usually tomentose. Calyx-tube downy but sometimes only slightly so; calyx-lobes always downy on the inside. Native of the Russian Far East, central and north-west China, Korea, and Japan. This variety was in cultivation at Kew in 1874, in which year it was figured in Bot. Mag. 6112 (as Pyrus baccata), but had probably been introduced earlier (the figure in Watson’s Dendrologia Britannica (1825) is considered by Rehder to represent this variety). Wilson reintroduced it from N.W. Hupeh in 1901, when collecting for Messrs Veitch.The Siberian and Manchurian crabs make sturdy trees which in time attain a fair size. Their foliage is healthy and the ivory-white flowers are borne freely in most years, but the fruits are too small to make much display.