ACER 159 



A. SlEBOLDIANUM, Miquel. SlEBOLD'S MAPLE. 



(Gardeners' Chronicle, 1881, i., fig. 113.) 



A small tree or shrub, native of Japan, and very similar to A. japonicum, 

 from which, however, it is easily distinguished by the yellow (not purple-red) 

 flowers, and by the branchlets being densely covered with short down. Leaves 



2 to 3 ins. wide ; seven- or nine-lobed ; leaf-stalks downy. Flowers in a 

 long-stalked, umbel-like corymb. Fruit somewhat downy ; keys in. long. 



A. SINENSE, Pax. 



A deciduous tree, from 12 to 30 ft. high ; young shoots smooth. Leaves 



3 to 6 ins. long and wide, five-lobed, slightly heart-shaped or truncate at the 

 base ; lobes ovate, with long drawn-out points, irregularly and sparsely 

 toothed. Occasionally the leaves are quite smooth at maturity, but often 

 they have tufts of yellowish hairs in the axils of the veins. Flowers numerous, 

 in panicles 2 to 4 ins. long, greenish white. Fruits smooth, in pendulous 

 panicles ; keys I J ins. long ; wings f in. wide, the pair forming an angle of 

 about 120. 



Var. CONCOLOR, Pax. This differs in the wings of the fruit spreading 

 horizontally, and, perhaps, in the leaf being somewhat larger. 



Native of Central China, and represented in the Coombe Wood nursery 

 by plants of the variety concolor, raised from seed introduced in 1901, by 

 Wilson. The leaves are handsome, being of a reddish shade when young, 

 afterwards turning a dark lustrous green. 



A. SPICATUM, Lamarck. MOUNTAIN MAPLE. 



A deciduous, tall shrub, or small tree of bushy appearance, occasionally 25 ft. 

 high, with a short trunk ; young shoots covered with grey down when young. 

 Leaves three-lobed or sometimes five-lobed, 3 to 5 ins. long, about the same 

 wide, more or less heart-shaped at the base, coarsely toothed, covered with grey 

 down beneath ; lobes long-pointed. Flowers very small, produced in June on 

 slender, erect racemes 3 to 6 ins. long, greenish yellow, each flower on a slender 

 stalk about ^ in. long. Fruit with wings about ^ in. long, f in. wide, each pair 

 somewhat horse-shoe shaped, smooth, red. 



Native of the E. United States and Canada ; introduced by Archibald, Duke 

 of Argyll, in 1750. This maple, handsome in its slender racemes of bright 

 red fruits, and red and yellow autumn tints, is not now common. Its most 

 distinctive characters are its densely flowered, erect, slender racemes, and 

 coarsely toothed, three-lobed leaves. 



An interesting maple, found wild in Japan, Manchuria, and China, is 

 sometimes regarded as a geographical variety of the mountain maple, and 

 called A. SPICATUM var. UKURUNDUENSE, Maximowicz. Its leaves are more 

 deeply heart-shaped than in the American type, and are five- or seven-lobed. 



A. SUTCHUENENSE, Franchet. 



A deciduous tree, 20 ft. high, with smooth young shoots. Leaves composed 

 of three leaflets borne on a slender stalk \\ to 2^ ins. long, with a conspicuous 

 tuft of yellowish hairs at the base of the blades ; leaflets shortly stalked, elliptic 

 oblong, with a long tapering point ; 2 to 3^ ins. long, f to i^ ins. wide ; dull 

 green, and smooth above, rather glaucous, and with scattered hairs beneath ; 

 the margins irregularly and bluntly toothed. Flowers numerous, yellowish, pro- 

 duced in a corymb-like raceme, i^ ins. long and wide. Fruits in erect racemes; 

 keys i in. long; wings \ in. wide, "curved, but about parallel with each other. 



