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Acer barbinerve Maxim.

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Bean

Genus

Other species in genus

Glossary

androdioecious
With only male or only hermaphrodite flowers on individual plants.
nutlet
Small nut. Term may also be applied to an achene or part of a schizocarp.
ovate
Egg-shaped; broadest towards the stem.
raceme
Unbranched inflorescence with flowers produced laterally usually with a pedicel. racemose In form of raceme.
unisexual
Having only male or female organs in a flower.

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Bean

A small, deciduous, dioecious tree, sometimes a shrub; young shoots downy. Leaves five-lobed, roundish to ovate in main outline, slightly heart-shaped at the base, slender-pointed, sharply, coarsely and unevenly toothed, the niche between the lobes very narrow; 2 to 312 in. long, almost or quite as wide; dark green and slightly downy when young above, softly downy beneath with conspicuous tufts in the vein-axils; stalk slender, often as long as the blade. Flowers yellowish, produced in April; those of the male tree in short clusters of four to six; those of the female tree on a raceme 2 in. long terminating a twin-leafed twig. Wings of the fruit 38 to 12 in. diameter spreading at an angle of about 120°, and, with the nutlet, making the whole fruit 114 to 112 in. wide.

Native of S.E. Manchuria; introduced about 1890. It is akin to A. argutum, another unisexual maple, from which its more coarsely toothed leaves, its petals being narrowed to a stalk at the base, and its larger fruits distinguish it.

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