9. Acer campestre (Linnicus), the Common Maple. Leaves heart shaped, with three or five deep segments which are not serrated, but generally two-lobed or three-lobed, and narrow at their base; downy beneath—at least, when young. Branches covered, when old, with a -corky bark. Flowers in erect, branched, downy corymbs. Keys short, smooth, with nearly parallel edges, diverging at right angles. Found in every hedge-row in England, and spread over the greater part of Europe. It is said not to be indigenous in Scotland, and on the conti nent it does not approach the north nearer than the southern provinces of Sweden. It advances as far to the eastward as the range of the Caucasus, where it disappears. In England this is either a bush or a small tree, of inelegant appearance, and its wood is of little value, except for the use of the turner, who makes it into cups, bowls, &c. I The Common Maple is sometimes planted by farmers upon bad land, fOr the purpose of fencing ; for which, however, it is ill adapted.
10. Acer Monspessulanum (Linnaeus), the Montpellier Maple. Leaves deciduous, very slightly cordate, and downy at the base, with three i perfectly entire, nearly equal, diverging lobes, slightly hairy beneath.
II. Ater erratum (Linn:ens), the Candian Maple. Leaves ever green. variable in form, wedge-eh/wed at the base, leathery, glossy, r000th, with three entire or aeivat(s1 lobes, of which the side ones are the shortcut, sometimes undivided. it is a native cf the mountains of Candi' and the Grecian Archipelago ; it is frequently cultivated in the South of Europe.
12. Acer heterophyllum (WiI1dsnow•), the Variable Maple. Leaves evergreen, ovate, unequally-nerrated, entire or occasionally three-lobed, very gloomy. This is the plant sold in the English nurseries under the name of A. Cry:item. It is rather delicate, and is a native of the Levant.
13. A crr pacndo-platanut (Linn:rue), the Sycamore Maple. Leaves heart-shaped, coarsely and nnequally serrated, glaucous and downy on the veins beneath ; with five lobes, of which the lower ones are generally the smallest. This noble tree is scarcely met with in a truly wild state beyond the limits of middle and southern Europe : it is occasionally seen on the lower ridges of the Caucasus, and does not nppear to extend much farther eastward. In Italy it is said to arrive at its greatest degree of perfection, acquiring the height of 50 and GO feet. Its English name has originated in an erroneous notion that this is the sycamore of Scripture—a totally different tree, the Fleas Sycamores. It flourishes in many parts of England : many varieties are known to gardeners.
14. Acer macrophyllum (Purah), the Broad-Leaved Maple. Leaves deeply heart-shaped, not serrated, divided into five deep, spreading, slightly-lobed segments, the middle one of which is often narrow at its base, and the lower ones generally smaller than the others ; when young slightly downy, when old shining and perfectly smooth : is a native of the north-west coast of North America, where its timber is used.
15. Ater stereediaerum (Wallich), the Shady Maple, is a large tree, with a trunk often three feet in diameter ; found in NepauL 16. rillosum (Wallich), the Shaggy Maple, is a very large tree,
found on the Himalaya Mountains, apprmching the limits of perpetual snow in Sirmoor and Kumaon.
17. Ater cultratum (Wallich), the Curve-Keyed Maple, is a largo tree, native of the regions towards the Himalayas., in Kumaou and Sr-iv:whim 13. Acer caudatum (Wallich), the Long-Pointed Maple. it is a native of the highest regions of Nepaul, of Sirmoor, Kumaon, and Srinaglinr.
19. A ter Platanofdes (Lin:cus), the Norway Maple. Leaves heart shaped, very smooth, except at the arils of the veins ; five-lobed, the lobes taper-pointed and diverging, with a few taper-pointed diverging teeth. This is a fine tree, with very handsome glossy deep-green leaves, for the sake of which it is a great deal cultivated. The northern and midland parts of Europe, and the north of Asia, as far as the Ural Mountains, produce this species. In the Russian Empire it passes from the state of a :shrub, in the northern provinces, to that of a handsome tree with a trunk two feet thick, in the more southern districts. Its wood is valued for turners work. From its ascending sap a kind of coarse sugar has been procured, in the same way as from the A. taccharinum, in America. Two varieties are known to gardeners; one, the Silver-Striped, in which the leaves are slightly stained with white ; and the other, the Cut-Leaved, in which the leaves are deeply and irregularly jagged. When the foot-stalks of the leaves are broken they exude a milky fluid.
20. Ater saccharinum (Linnrcua), the Sugar Maple. Leave heart shaped, glaucous beneath, very smooth, except at the :mils of the veins ; fivelobed, the lobes taper-pointed, and very coarsely toothed. Flowers in nodding corymbs. Keys not much diverging. From a little to the north of the Saint John, in Canada, to the woods of Upper Virginia, and probably still farther south, this species prevails; and it forms a large portion of the vegetation of New Brunswick, Nova Scotia, Vermont, and New Hampshire, sometimes becoming as much as 80 feet high. In the autumn the woods of those countries are dyed of a crimson hue by the changing leaves of the Sugar Maple. The wood is hard, and has a satiny lustre, but it is readily attacked by insects. end is not of much value, except when its grain is accidentally waved, and then it is in request for the cabinet-makers. The younger Michaux states, that it may be at all times known from that of the Red Maple by a very simple test. If you pour a drop or two of solution of sulphate of iron upon the wood of the Sugar Maple, in a minute it becomes of a greenish cast, while that of the Red Maple becomes deep blue. The saccharine matter contained in its ascending sap is the principal cause of this species being in so much request. From this, obtained by tapping the trunk in the spring during the space of six weeks, a very considerable quantity of a fine brown sugar is procured ; as much, it is said, as 33 Ilm. per tree. The Sugar Maple does not generally succeed very well in England, where it is rarely seen ; and even when in health does not attain a height of more than fifteen or sixteen feet.