276 CHINESE ECONOMIC TREES 



Three species in China and Japan. Referred by some botanists to 

 Halesia. 



Pterostyrax micranthum Siebold & Zuccarini. 

 (Pterostyrax hispidum Siebold & Zuccarini.) 

 (Halesia hispida (S. & Z.) Masters.) 



Tree sometimes 16 m. tall with gray-brown bark. Leaves without 

 stipules, 6-21 cm. long, 3-10 cm. wide, elliptic or ovate to oblong, acute 

 or acuminate, base cuneate, denticulate, green above, pale and glabrous 

 or slightly tomentose below; petiole 1-2.5 cm. long. Panicles axillary, 

 10-16 cm. long with 2 or 3 leaves at the base of the inflorescence ; flowers 

 cream-white, fragrant, about 8 mm. long; ovary 3 celled; ovules 4 in 

 each cell; style longer than the stamens. Fruit 1 cm. long, 2.5 mm. 

 wide, tapered at both ends, 10 ribbed, densely hairy, crowned by the 

 style. 



China and Japan. 



This plant is most often found under Pterostyrax hispidum in 

 botanical literature but as P. micranthum refers to the same species and 

 has prior place in the writings of Siebold and Zuccarini it should, by the 

 rules of nomenclature, be regarded as the oldest botanical name. 



Pterostyrax corymbosum Siebold & Zuccarini. 



Shrub or small tree. Leaves serrulate, usually with bristle pointed 

 teeth, to 12 cm. long. Panicles corymbose, to 13 cm. long. Fruit with 

 4-5 narrow wings. 



China and Japan. In China only known from Kuling, Kiangsi. 



STYRAX 



Shrubs or small trees, more or less stellate pubescent. Leaves 

 deciduous or evergreen, alternate, stalked, without stipules. Flowers 

 usually large, in drooping clusters; calyx campanulate, slightly 5 toothed, 

 adnate to the base of the ovary; petals 5, slightly connate at the base; 

 stamens 10 or fewer, inserted at the base of the corolla, free or monadel- 

 phous,' ovary superior, 3 celled at the base; ovules several in each cell; 

 style slender; stigma 3 parted or capitate. Fruit a drupe, globose or 

 oblong, dry or fleshy, the pericarp dehiscent into 3 valves at the apex. 

 Seeds 1-2, large, subglobose. 



