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638 VI. Leaves simple, five-lobed ; basal lobes well developed; green beneath ; margin serrate; petiole without latex.


 * 39. Acer Oliverianum,' Pax. Central China.
 * Leaves 3½ inches long, 4 inches broad; lobes long acuminate, finely and simply serrate; glabrous beneath, except for pubescent tufts at the base and in the axils of the primary and secondary nerves.
 * A small tree, 20 feet in height. Introduced by Wilson in 1901. Plants at Coombe Wood are thriving, and are about 12 feet high.


 * 40. Acer argutum, Maximowicz. Japan.
 * Leaves about 3 inches long and broad; lobes triangular, acuminate, sharply bi-serrate ; lower surface with scattered white pubescence, dense on the nerves and veinlets. Young branches densely pubescent.
 * A small tree, introduced by Maries in 1881. There are small specimens in the Kew Collection, and a good-sized one at Westonbirt.


 * 40a. Acer palmatum, Thunberg. (See No. 46.)

VII. Leaves simple, five-lobed; basal lobes well developed; green beneath ; margin with a few teeth or lobules, ciliate.


 * 41. Acer campestre, Linnæus. Europe, Caucasus, Northern Persia.
 * Leaves (Plate 207, Figs. 23, 24, 25) 2½ inches long, 3 inches broad; margin irregularly and obtusely dentate; dark-green, and pubescent on the nerves above ; light-green beneath with scattered pubescence, densest on the nerves, and tufted in the axils. (See description, p. 651.)


 * 42. Acer macrophyllum, Pursh. Alaska to California.
 * Leaves (Plate 205, Fig. 3) about 9 inches long and broad; margin with large triangular lobules or teeth; upper surface dark-green, shining, scattered pubescent; lower surface light-green, glabrescent between the nerves, with tufts of white pubescence in the axils. (See description, p. 681.)


 * 43. Acer Miyabei, Maximowicz. Yezo.
 * Leaves 5 inches long, 6 inches broad; lobes with long acuminate obtuse-tipped apex, and with one or two pairs of obtuse lobules; sinuses narrow, acute at the base ; both surfaces pubescent, densest on the nerves; petiole and young branchlets pubescent.
 * A tree, attaining 40 feet in height. Introduced by Sargent, who obtained seeds from Miyabe in 1892. There are young trees at Kew and Coombe Wood ; and one at Grayswood, near Haslemere, was about 18 feet high in 1906.


 * 44. Acer diabolicum,? Blume. Japan.
 * Leaves (Plate 207, Fig. 26) 6 inches long, 6½ inches wide; lobes short,

1 Acer sp. in J.H. Veitch, Journ. Roy. Hort, Soc. xxix. 354, fig. 98 (1904).

2 Specimens of reputed Acer Francheti, Pax, from Coombe Wood, introduced by Wilson in 1901, are indistinguishable from this species. Cf. Journ. Roy. Hort. Soc. 353, fig. 88 (1904).