ACERACEAE 227 



saccharum, besides being a valuable timber tree, yields a richly sac- 

 charine sap which is made into sugar. Few trees surpass the maples for 

 street and lawn planting. 



The wood of several American species is valued in wood-using 

 industries. The maples in this country do not attain the size or 

 importance that they do in North America, where several species are 

 important constituents of the forests. 



Acer henryi Fax. 



Tree 10 m. tall. Young branchlets pilose. Leaf compound; petiole 

 6-7 cm. long, pubescent; leaflets 3, 5-9 cm. loDg, elliptic, acuminate, 

 stalked, entire or coarsely toothed, pale green, pubescent beneath. 

 Flowers in pubescent racemes, nearly sessile, small, greenish. Fruits in 

 pendulous racemes, glabrous, short pedicelled, wings ascending or spread- 

 ing, 1-2 cm. long. 



Central China. 



Acer pictum var. parviflorum Schneider. 



Tree 18 m. tall. Branchlets gray or gray-brown, with numerous 

 conspicuous lenticels. Leaves bright green, 3-7 lobed, about 10 cm. long, 

 base rounded, truncate or cordate, pubescent beneath when young. 

 Flowers yellow. Wings of fruit horizontal or spreading, brownish -yellow, 

 slightly less than 2 times as long as the nutlet. 



Western and Central China. Yunnan, Szechuan, Hupeh, Cbihli, 

 Manchuria and Japan. 



The type is said not to. occur in China. 



Acer cappadocicum Gleditsch. 

 (A. laetum C. A. Meyer.) 



Tree to 16 m. tall, with smooth greenish or greenish-purple bark on 

 the branchlets. Otherwise the tree is very similar to the above species. 



Further study may prove this species to be identical with Acer pictum. 

 Several varieties have been described. 



From Caucasus to the Himalayas and Western China. 



