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Acer mandshuricum Maxim.

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Bean

Genus

Other species in genus

Glossary

glabrous
Lacking hairs smooth. glabrescent Becoming hairless.
inflorescence
Flower-bearing part of a plant; arrangement of flowers on the floral axis.
lanceolate
Lance-shaped; broadest in middle tapering to point.
leaflet
Leaf-like segment of a compound leaf.
midrib
midveinCentral and principal vein in a leaf.

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Bean

A small, deciduous tree, sometimes a shrub. Leaves composed of three leaflets, on a stalk up to 4 in. long. Terminal leaflet 2 to 312 in. long, 1 to 114 in. wide, lanceolate, pointed, saw-toothed, glabrous when mature except for hairs along the midrib; the side leaflets are rather smaller and shorter-stalked than the terminal one; main leaf-stalk often longer than the largest leaflet. Flowers greenish yellow, often produced in threes; stamens not protruding. Fruit glabrous, purplish when young; keys 114 to 112 in. long; wings 12 in. wide, the pair forming an angle of about 90°.

Native of E. Siberia and Manchuria; trees in cultivation at Kew were received from St Petersburg in 1904. This maple is closely allied to A. nikoense and A. sutchuenense; the former differs in its hairy young leaves and flower-stalks, the latter in its many-flowered inflorescence and protruding stamens. It is very liable to injury by late spring frost. There is an example at Kew about 14 ft high and another of 22 ft, about twenty-five years planted, in the Chandlers Ford nursery of Messrs Hillier. Like many trees from continental N.E. Asia it is ill-adapted to our climate; in the hotter summers of New England it thrives and sets fertile seed.

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