TJLMACEAE 105 



acuminate, rounded at the base with a few small, spiny appressed teeth, 

 sometimes entire, 6-13 cm. long. Fruit ripening in 1 season, 1-3 together, 

 short stalked; acorn ovoid, 2 cm. long or slightly less; cupule cup-shaped 

 with thin, nearly glabrous scales. 



Hupeh and Szechuan. 



Always a small tree common in rocky places. Introduced into 

 Europe and America for ornament. In Japan it is planted for hedges. 

 Often confused with Q. glauca. 



Q. acrodonta Seeinen. 



Tree 5 m. tall. Confined to Hupeh and very rare, may prove to be 

 only a variety of Q. phillyrseoid.es. 



Q. baronii Skan. 



A semi-evergreen shrub with membranous, spinescent leaves and 

 a biennial fruit in a cup with recurved linear scales, resembling that of 

 Q. spathula. 



Q. griffithii Hooker f. & Thompon. 



Tree 3 m. tall. Closely related to Q. aliena, from which it is distin- 

 guished by the pubescent branchlets and the slightly fringed cup. 

 Yunnan. 



Quercus bambusifolia Hance. 



A very distinctive species with dark purplish branchlets, usually 

 entire lanceolate leaves and a large fruit ripening the second year. 



S. China. 



Quercus vestita Rehder and Wilson, Yunnan; Q. delavayi Skan, 

 Yunnan,; Q. schottkyana Rehder and Wilson, Yunnan, are other species 

 of minor importance. 



ULMACEAE 



Leaves alternate, stipules caducous. Flowers dioecious or monoe- 

 cious. Perianth single, persistent, campanulate. Ovary free, 1-2 celled ; 

 styles 2. Fruit a samara or a drupe, 1 seeded, exalburninous. 



13 genera and about 140 species widely distributed over the 

 temperate and tropical regions.' Of the 13 genera, 7 woody genera occur 

 in China. Several members of this family are in cultivation for timber 

 and ornament. Celtis is the largest genus, with 60 species. 



