118 CHINESE ECONOMIC TREES 



beds and are given half shade during the first year. After one trans- 

 plantation, the seedlings are ready to be set out in the permanent field. 



Zelkova serrata Makino. 



(Zelkova acuminata Planchon.) 

 (Zelkova keaki Maximowicz.) 

 (Zelkova hirta Schneider.) 

 (Zelkova sinica Schneider.) 



Tree up to 30 m. tall with pale gray bark peeling off in small round 

 flakes. Branches slender. Leaves ovate to oblong-ovate, acuminate, 

 rounded or slightly oblique or broadly cuneate at the base, coarsely and 

 sharply serrate with blunt or apiculate teeth, green, somewhat rough 

 and sparsely pilose, with impressed veins above, pubescent or hairy only 

 along the veins and grayish-green beneath; 2.5-6 cm. long; on sterile 

 branches sometimes up to 12 cm. long. Fruit irregular rhombic, or 

 ovoid, glabrous, about 5 mm. long and broad, with the persistent, 5-lobed 

 calyx at the base and 2 incurved stigma set obliquely upon the apex. 



China and Japan. 



Hupeh, Shensi, Chekiang, Kiangsu, Anhwei. 



With extensive material before me, I am unable to distinguish 

 Z, sinica Schneider from Z. serrata Makino. 



An edible mushroom sometimes grows on the wood of this tree. 



HEMIPTELEA 



Deciduous tree with spinescent branches. Leaves alternate, 2: 

 ranked on the branches, ovate, pinnately veined, short stalked, some- 

 what oblique at the base, acute, crenate serrate, stipules deciduous. 

 Flowers perfect, pedicelled, 1-4 in a fascicle on branches of the current 

 year's growth. Perianth cup-shaped to campanulate, 4-51obed; stamens 

 usually 4, opposite the calyx lobes, inserted near the base of the perianth. 

 Fruit a half winged nutlet surrounded at the base by the persistent 

 perianth, obliquely conical, enlarged at the base, produced into a short 

 horny beak; the unevenly toothed wing attached near the apex. Ovule 

 single. 



Only 1 species described, closely related to, and by some authors 

 included under Zelkova, which it resembles in foliage and habit but from 

 which it may be distinguished by the thorny branchlets, by the winged 

 fruit and by internal structure. 



