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A small tree 12 to 18 ft high; young branches purple, soon quite glabrous. Leaves ovate or oval, 11⁄2 to 3 in. long, half as wide, rounded or tapering at the base, rather long-pointed, slightly toothed, the midrib glandular and slightly hairy above, otherwise the leaf is quite glabrous on both surfaces and of a dark polished green above, often purple-tinted, especially on the midrib; stalk 1⁄2 in. or less long. Flowers deep rose, 1 to 11⁄2 in. across, from four to seven in a cluster, each flower on a glabrous, reddish purple stalk 1 to 11⁄2 in. long; petals five to eight; calyx reddish purple and glabrous outside, woolly within; calyx-lobes triangular-ovate, blunt at the apex. Fruits obovoid, purple, the size of a small pea, marked at the top with the scar of the fallen calyx.
A native of Chinese and Japanese gardens, not known in the wild in its typical state. It was first introduced to America from Japan about 1863 by Dr G. R. Hall, after whom it is named. It has some affinity with M. floribunda and has been known in gardens as M. floribunda plena, the flowers being often semi-double. M. halliana is abundantly distinct in habit, in the nearly glabrous character of its parts, and it never appears to have the deeply lobed leaves occasionally seen in M. floribunda. Also, in M. halliana the leaves are convolute in the bud, not folded as in M. floribunda, and dark green.
Wilson collected a specimen in W. Szechwan which was at first identified as M. halliana but later proved to be M. hupehensis; this error explains the statement made in previous editions that M. hallinana occurs wild in W. Szechwan. Although M. halliana does not grow wild in Japan in its typical state, a crab closely related to it has been found there. This is:
Pyrus floribunda atrosanguinea Späth
Malus floribunda var. atrosanguinea Bean
M. floribunda var. spontanea Mak