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A small tree or large shrub with downy branchlets. Leaves five-lobed (more rarely seven-lobed), 3 to 5 in. long and as much wide, cordate at the base, covered beneath with a yellowish down; lobes tapered at the apex, ovate or triangular, margins sharply toothed and incised. Flowers in upright, slightly compound, hairy racemes. Wings of fruit almost upright; keys slightly downy or glabrous, about 3⁄4 in. long.
Native of the mountains of Japan and of N.E. Asia; date of introduction uncertain, but later than 1881. It is closely related to the east American A. spicatum, of which Maximowicz made it a variety; but in that species the leaves are usually only three-lobed.
A. caudatum var. multiserratum (Maxim.) Rehd.
A. erosum Pax
A. parviflorum Franch. & Sav., not Ehrh.
A. brevilobum Hort. Hesse