640 The Trees of Great Britain and Ireland 



mentioned by Mr. J. H. Veitch, one of which, growing well at Mount Usher, 

 Wicklow, Ireland, has deeply-cut leaves, figured on Plate 207, Fig. 29. 



49. Acer Sieboldianum, Miquel. Japan. 



Leaves about 2 inches in length and breadth ; lobes usually nine, acuminate ; 

 sinuses reaching nearly half the length of the blade ; glabrous above with a 

 tuft of hairs at the base ; pubescent beneath on the main nerves. Young 

 branchlets covered with dense white pubescence. 



A small tree or shrub, very rare in cultivation. 



IX. Leaves compound ; leaflets three or five. 



A. Lea/lets entire in margin. 



50. Acer Henryi^ Pax. Central China. 



Leaflets three, narrowly elliptical, acuminate ; under surface green, pubescent 

 on the midrib and lateral nerves, forming axil - tufts. Young branchlets 

 pubescent. 



A small tree, attaining about 30 feet in height. Introduced by Wilson in 

 1900. Young plants at Coombe Wood are now about 10 feet high, and are 

 hardy and thriving. 



B. Leaflets serrate or toothed. 



* Leaflets green beneath. 



51. Acer Negundo, Linnaeus. North America. 



Leaflets (Plate 205, Fig. 2) usually five, occasionally three ; coarsely and 

 irregularly toothed and serrate, sometimes three-lobed ; under surface with 

 scattered pubescence, dense on the primary and secondary nerves ; petioles 

 glabrous. Young branchlets glabrous, green or glaucous. (See description, 



p. 684.) 

 ""^ 52. Acer Negundo, var. californicum, Wesmael. California. 



Leaflets (Plate 205, Fig. i) three or five, resembling those of the last species, 

 but with coarser teeth and serrations ; lower surface covered with a dense 

 white pubescence. Petioles and young branchlets pubescent. (See description, 

 p. 684.) 

 53. Acer cissifolium, Koch. Japan. 



Leaflets three, obovate or oblong, with a long acuminate or cuspidate apex ; 

 margin ciliate with serrations ending in fine points ; under surface glabrous, 

 except for axil-tufts and slight pubescence along the midrib. Young branchlets 

 pubescent. 



A small tree, perfectly hardy, and fruiting freely in this country. A 

 specimen of this species about 30 feet high, which Prof. Sargent says is as 

 large as he saw it in Japan, is growing at Westonbirt. 



' Acer sulchuense, Franchet, also from Central China, differs in the glabrous branchlets and serrate leaflets, which are pale 

 beneath, and has not yet Iwen introduced, the plants referred to this species in Journ. Roy. Hort. Soc. xxix. 353, figs. 93, 96, 

 being A. Henryi, Pax. Acer mandschuricum, Maximowicz, a native of Manchuria, which differs little from Acer sutchuense 

 in foliage, is said to be in cultivation in Germany (Mitt. Deutsche Dendrol. Ges. 1906, p. 30). 



