638 The Trees of Great Britain and Ireland 



VI. Leaves simple, five-lobed ; basal lobes well developed ; green beneath ; 



margin serrate ; petiole without latex. 



39. Acer Oliverianum^ Pax. Central China. 



Leaves 3^ 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. 



* Petiole containing latex. 



41. Acer campestre, Linnaeus. Europe, Caucasus, Northern Persia. 



Leaves (Plate 207, Figs. 23, 24, 25) a^iinches 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. 



** Petiole without latex. 

 44. Acer diabolicum^ Blume. Japan. 



Leaves (Plate 207, Fig. 26) 6 inches long, b\ inches wide ; lobes short, 



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



2 Specimens of reputed Acer Francheti, Pax, from Coombe Wood, introduced by Wilson in 190 1, are indistinguishable 

 from this species. Ci. Joum. Roy. Hort. Soc. 353, fig. 88 (1904). 



