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A deciduous shrub 5 or 6 ft high, with brown slender branches furnished with starry down. Leaves narrowly oval-lanceolate, slenderly pointed, wedge-shaped at the base, inconspicuously toothed, 11⁄2 to 31⁄2 in. long, 1⁄2 to 1 in. wide, covered with a white, very close down beneath; stalk about 1⁄8 in. long. Flowers white, 3⁄4 in. wide, borne in May on erect, slender panicles 2 to 31⁄2 in. long, that terminate short lateral twigs carrying one or two pairs of leaves; petals oblong; calyx cup-shaped with short teeth.
Native of Japan; introduced in 1915. It is closely related botanically to D. scabra, differing from that well-known species in the long narrow leaves being white beneath (green in scabra) and in the more slender growths.
In previous editions of this work, this species was named D. hypoleuca. It was described by Maximowicz in 1888 as D. discolor, evidently in ignorance of the fact that Hemsley had used that name for another species in the previous year. In 1892 Maximowicz renamed his own species as D. hypoleuca, but he was antedated by Makino, who, in the same year, but nine months earlier, had named the species in honour of its author.