ACER 161 



Native of the Caucasus and Persia ; introduced to Van Volxem's nursery in 

 1866. It is a handsome-foliaged tree, and is distinguished in spring by its 

 brilliant crimson bud-scales. It has been much confused with A. insigne, but 

 is distinguished fyy the wings of the fruit not spreading, by the restricted 

 pubescence beneath the leaves, and by the marginal teeth not pointing 

 forwards. 



A. TRUNCATUM, Bunge. 



A small, deciduous tree, up to 25 ft. in height ; branchlets smooth, often 

 tinged with purple when young. Leaves five- occasionally seven-lobed, 

 2^ to 4^- ins. wide, less in length, dark green above, paler below ; smooth on 

 both surfaces ; truncate or somewhat heart-shaped at the base ; the lobes 

 triangular ; the two basal ones out-spreading, the three terminal ones often 

 furnished with two large teeth ; leaf-stalk containing milky juice. Flowers 

 A to \ in. across, greenish yellow, each on a slender stalk \ in. long, borne in 

 erect, branching corymbs 3 ins. wide. Fruits smooth ; wings i^ to i^ ins. long, 

 I to i in. wide, about half as long again as the nutlet, the pair fprming an angle 

 of about 90. 



Native of N. China, whence seeds collected in the autumn of 1881 were sent 

 by the late Dr Bretschneider to Kew, and germinated in the spring of the 

 following year. It is allied to A. pictum, but differs in the truncate base of 

 the leaf, and the larger flowers. It grows well and is quite hardy at Kew. 

 Another close ally of this maple is A. AMBIGUUM, Dippel^ with leaves similarly 

 lobed, but hairy beneath. 



A. TSCHONOSKII, Maximowicz. 



A small, deciduous tree, 15 to 20 ft. high, or a shrub ; young shoots smooth ; 

 winter buds stalked. Leaves 2 to 4 ins. long and wide, deeply five-lobed, 

 heart-shaped at the base, margins sharply double-toothed ; lobes triangular, 

 long-pointed ; leaf-stalk half as long as the blade ; bright green and smooth 

 above, paler beneath, with reddish hairs along the main veins when young, 

 reduced to their axils when mature. Flowers on smooth, short stalks, 

 produced along with the leaves, six to ten together, in short racemes. Fruits 

 pale brown ; keys I to i ins. long ; wings f in. wide, incurved, and spreading 

 at a wide angle. 



Native of Japan, where, according to Prof. Sargent, it is very abundant 

 in the woods of Hondo at from 2000 to 3000 ft. elevation, the dying leaves 

 turning a beautiful canary yellow. It is allied to A. micranthum, from which 

 it differs in its usually longer keys. Introduced in 1902. 



A. VOLXEMI, Masters. VAN VOLXEM'S MAPLE. 



A tall, deciduous tree ; branchlets smooth except at the joints and leaf- 

 scars. Leaves palmate, five-lobed, 4 to 8 ins. or even more wide, and nearly 

 as much long, with a heart-shaped base ; pale green above, whitish beneath, 

 and smooth except in the axils and along the sides of the chief veins ; the 

 lobes coarsely saw-toothed. Flowers in erect corymbs, 3 to 4 ins. long 

 Fruit smooth ; keys i^ to if ins. long ; wings at an angle of about 120. 



Native of the Caucasus, where it was discovered and introduced to cultiva- 

 tion by the late Mr Jean Van Volxem, who sent it to Kew about 1873. Another 

 tree sent to Dr Masters in 1877 was planted by him in his garden at Ealing, 

 where it grew luxuriantly, and flowered in 1894. Some doubt had previously 

 existed as to its affinity with A. Pseudoplatanus, but its short, erect corymb at 

 once showed its distinctness. By several authorities it is considered a less 

 downy variety of A. insJgHe. Henry suggests that it may be a hybrid between 

 that maple and A. Trautvetteri.' It differs from the latter in the wide-spreading 



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