Acer 633 



three-nerved at the rounded base ; under surface glaucous, glabrous, without axil- 

 tufts. Petiole without latex. Young branchlets slightly pubescent. 

 A young tree is growing vigorously at Kew. 



10. Acer crat(sgifolium, Siebold et Zuccarini. Japan. 



Leaves 3 inches long, coriaceous, ovate, cordate at the base, acuminate at the 

 apex, usually with two short lateral lobes, occasionally undivided, dark-green and 

 shining above, pale and glabrous beneath. Petiole without latex. Bark striate. 



A small tree, attaining about 20 feet in height, pyramidal in habit. Introduced 

 by Maries in 1881. Var. Veitchii is variegated with irregular blotches of pink 

 and white. 



1 1. Acer ginnala, Maximowicz. Amurland, Southern Mongolia, China, Japan. 



Leaves 3 inches long, 2^ inches wide ; terminal lobe elongated ; under surface 

 bright-green, scattered pubescent or glabrescent, without axil-tufts. Petiole 

 without latex. 



A small tree, with leaves assuming in autumn a brilliant red tint. Var. 

 Semenovii, from Turkestan, has smaller leaves, occasionally five-lobed. 



**** Leaves regularly bi-serrate. 



^"12. Acer pennsylvanicum, Linnaeus. North America. 



Leaves (Plate 206, Fig. 13) 7 inches long, 6 inches wide; lobes arising from 

 the upper part of the leaf, triangular, acuminate ; under surface with scattered 

 minute pubescence ; petiole without latex. Young branchlets not glaucous. 



Introduced in 1759, and remarkable for its striated bark, green branchlets, 

 and fruit in drooping long racemes. It rarely attains a height of 40 feet. 



13. Acer ru^nerve, Siehold et Zuccarini. Japan. 



Leaves 3^ inches long, 3 inches wide, resembling in shape those of 

 A. pennsylvanicum, but smaller, and with reddish pubescence along the 

 sides of the primary nerves, forming axil-tufts. Racemes erect and reddish- 

 tomentose. Young branchlets glaucous. 



This is the representative in Japan of A. pennsylvanicum, which it resembles 

 in bark, habit, and size. The type was introduced by Maries in 1881, and there 

 are thriving small specimens at Kew. A variety, with the leaves white on the 

 margin, was exhibited by Standish in 1869 at the Horticultural Society, and 

 was figured in the Botanical Magazine, t. 5793. 



14. Acer capillipes, Maximowicz. Japan. 



This species strongly resembles the last, but differs in the glabrous leaves, 

 and non-glaucous young branchlets ; racemes glabrous, pedicels long. 



A small tree or shrub, introduced by Sargent in 1892, and represented at 

 Kew by a thriving young specimen. The autumn tint is purplish-brown, 

 suffused with yellow along the nerves. 

 '^15. Acer spicatum, Lamarck. North America. 



Leaves about ^\ inches long and wide, broadly ovate, acuminate, ciliate in 

 margin, glabrous above, pubescent beneath. Petioles and young branchlets 

 pubescent. 



