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A shrub up to 10 or 12 ft high, forming a dense mass of slender, arching branches, which become a dark purplish brown the second year; young shoots nearly free from down, slightly ribbed. Leaves ovate to ovate-lanceolate, broadly wedge-shaped at the base, slender-pointed, distantly and minutely toothed, 11⁄4 to 31⁄2 in. long, 1⁄3 to 15⁄8 in. wide, glabrous except for a few hairs on the margins and ribs beneath when young. Flowers delicately scented, pure white, 11⁄2 to 2 in. across, produced at the end of twigs 2 to 4 in. long in racemes of three to seven flowers. Petals oblong-lanceolate, 1⁄4 in. wide, slender-pointed; calyx glabrous, except for minute down at the margins of the lance-shaped lobes; styles separated half-way down.
The origin of this mock orange is not known; it was first distinguished in Parson’s nursery at Flushing, Long Island, USA, and is probably a hybrid. It is not one of the best of the genus, and although elegant in habit is shy-flowering, at least in this country. Its long, narrow petals make it one of the most easily distinguished of the genus.