ULMACEAE 115 



except at the base, glabrous, dull green above, lighter green beneath, 

 veins impressed and not prominent. Flowers monoecious; staminate 

 calyx 5-parted; stamens 5. 



Pistillate flower solitary in the axils of the season's shoots, appearing 

 in March and April; pedicels distinctly but sparsely pilose; calyx lobes 

 4, lanceolate, greenish, slightly pilose, scarcely longer than the ovary ; 

 ovary sessile, elliptic-rounded, laterally compressed, sparsely pilose ; 

 stigmas 2, lanceolate, divergent. Fruit a winged nut, solitary, axillary, 

 on a slender pedicel; wing thick, more or less square or broader than 

 long, or suborbicular, emarginate below and above the nut; nut Celtis- 

 like, usually crowned by the remnant of the style. 



The genus includes a single species closely resembling Celtis but 

 distinguished from it by the winged nut. 



Pteroceltis tartarinowii Maximowicz. 

 (Ulmus cavaleriei laveille.) 



Tree 16 m. tall with characteristic pale gray bark peeling off in 

 irregular long flakes. Leaves 4-9 cm. long. Fruit up to 13 mm. long; 

 pedicel 2.5 cm. long or more. 



Hupeh, Szechuan, Shensi, Chihli, Shantung, Kweichow. 



APHANANTHE 



Deciduous trees or shrubs. Leaves alternate, 2-ranked, serrate, 

 petiolate and stipulate. Flowers monoecious, small and inconspicuous; 

 staminate numerous, in axillary cymose clusters at the base of the twigs; 

 sepals and stamens 5. Pistillate solitary, axillary; ovary 1 celled and 

 1 ovuled ; styles 2. Fruit a drupe. 



About 3 species in E. Asia and Australasia. They resemble Celtis, 

 but may be distinguished by the unisexual flowers and the leaves having 

 straight veins ending in the teeth. In Celtis the veins curve and unite 

 near the margin. 



Aphananthe aspera (Thunberg) Planchon. 



Tree to 20 m. tall. Leaves ovate, to ovate-oblong, long pointed, 

 cuneate or rounded, more or less oblique and 2 nerved at the base, 

 parallel veined with the veins ending in the teeth, rough and hairy on 



