ACER 143 



Native of Western N. America ; originally discovered by Thos. Nuttall on 

 the head-waters of the Columbia River in N. Montana, whence it extends south- 

 wards to Arizona and New Mexico. It is represented in the Kew collection by 

 plants received from Prof. Sargent in 1885, which was probably its first intro- 

 duction to England. It is allied to the Sugar Maple (A, saccharum), and repre- 

 sents that species on the western side of N. America. 



A. GRISEUM, Pax. 



A deciduous tree, up to 40 ft. high, with peeling bark ; branchlets woolly. 

 Leaves composed of three leaflets borne on a downy stalk ; terminal leaflet 2 

 to 2^ ins. long, half as wide, oval-lanceolate, with three to five pairs of coarse 

 teeth ; short-stalked ; side leaflets smaller, oblique at the base, stalkless. 

 Flowers few or solitary, on pendulous downy stalks I in. long. Fruit with very 

 downy nutlets and wings ; each key i j ins. long ; wings ^ in. wide, the pairs 

 forming an angle of 60 to 90. 



Native of Central China ; introduced by Wilson for Messrs Veitch in 1901. 

 Among the trifoliolate group of maples this is very distinct, because of the large 

 blunt teeth on the leaflets. Its nearest ally is A. nikoense, but in this the 

 leaflets are twice as large and scarcely toothed. Mr Wilson informs me that 

 it is the most striking of the trifoliolate maples, especially on account of its 

 peeling bark, which hangs on the stem in large loose flakes, revealing the 

 orange-coloured newer bark within ; also for the fine autumnal red or orange 

 of its leaves. 



A. HELDREICHII, Orphanides. HELDREICH'S MAPLE. 



A deciduous tree, of medium height ; branchlets smooth, dark, marked with 

 pale oblong lenticels. Leaves 4 to 7 ins. wide, not quite so long, five-lobed, 

 the three terminal lobes reaching nearly to the base, the basal pair not so 

 deep or sometimes absent ; lobes oblong-lanceolate, coarsely toothed ; there is 

 a tuft of hairs at the base on the upper side, and brown wool along the principal 

 veins beneath ; otherwise the leaves are smooth ; rather glaucous beneath. 

 Flowers yellow, produced at the end of May in short, broad corymbs. Fruits 

 smooth ; the keys i^ to 2 ins. long ; wings f in. wide, spreading at about 60. 



Native of the Balkan States and Greece ; introduced about 1879. It is very 

 distinct and striking in foliage, on account of the deep, comparatively narrow 

 lobes. The leaves suggest a Virginian creeper, and are unlike any other of the 

 large-leaved European maples. In depth of lobing they resemble A. platanoides 

 var. palmatum (A. Lorbergii), but the lobes themselves are quite differently 

 shaped. A handsome maple. 



A. HENRYI, Pax. HENRY'S MAPLE. 



A deciduous tree, 30 ft. high ; branchlets downy at first, soon becoming 

 smooth. Leaves composed of three leaflets borne on a slender common stalk 

 2 to 4 ins. long ; leaflets -2\ to 4 ins. long, i to i| ins. wide, oval, with a long 

 drawn-out point, wedge-shaped at the base, not toothed ; green on both 

 surfaces and downy on the veins, especially beneath. Flowers in slender 

 downy spikes, produced in May before the leaves from the naked joints of the 

 previous year's wood. Fruits red when young, in racemes 6 to 9 ins. long, 

 each fruit very short-stalked, smooth ; keys f to I in. long ; wings divergent at 

 a small angle. 



Native of Central China ; discovered by Henry, and introduced by Wilson 

 in 1903 for Messrs Veitch. It belongs to the same group as nikoense and 

 cissifolium, but differs from them and all other trifoliolate maples in the entire 

 margins of the leaflets and in the stalkless flowers. Young trees in the Coombe 

 Wood nursery are 12 to 14 ft. high. 



