264 PTEROCARYA PTEROSTYRAX 



short beak, the two wings erect, narrow, tapering, in. long, ^ in. wide at the 

 base, forming a V. 



Native of China, whence specimens were sent to France by a missionary 

 named Calery in 1844, on which Mr Casimir de Candolle founded the species. 

 It appears to have been introduced to Europe about 1860. It will, no doubt, 

 thrive best in moist loam like P. caucasica, but very few plants appear to be in 

 cultivation. The best, according to Elwes, is in Lord Ducie's collection at 

 Tortworth, about 35 ft. high. I saw a tree fruiting freely at Segrez, in France, 

 in July 1904. Its winged leaf-stalks and the erect narrow wings of the nuts 

 distinguish it from P. caucasica. 



PTEROCELTIS TATARINOWI, Maximowicz. URTICACE^E. 



A deciduous tree with the habit and general aspect of a Celtis ; young 

 shoots slender and, like the leaves, at first clothed with small appressed 

 hairs which mostly soon fall away. Leaves alternate, toothed, ovate 

 lance-shaped ; 2 to 4 ins. long, f to 2 ins. wide ; the apex with a long 

 tapered point, the base three-nerved and broadly wedge-shaped; upper 

 surface harsh to the touch, with innumerable minute warts, lower surface 

 with tufts of down in the vein-axils; stalks \ to \ in. long. Flowers 

 unisexual, the males in stalkless clusters, the females solitary in the leaf- 

 axils; neither of any beauty. Fruit a globose nut about \ in. wide, 

 surrounded by a circular wing notched at the top, the whole \ to J in. 

 wide, borne on a slender stalk about \ in. long. 



Native of Central Chiria; introduced to France in 1894 by Mr 

 Maurice de Vilmorin, who raised the first plants at Les Barres from seed. 

 One of these I saw bearing fruit in July 1904, but none of its seeds had 

 up to then proved fertile. It was introduced to Kew in 1897. Interesting 

 botanically, it will probably only appeal to connoisseurs and lovers of 

 curiosities, for the flowers are quite inconspicuous. Closely allied to 

 Celtis, it is very distinct in its winged fruits, which more resemble those 

 of Ulmus, but their arrangement singly irl the leaf-axils of the shoots of 

 the year make the tree very distinct from the elms. This is the only 

 species of the genus known. 



PTEROSTYRAX. STYRACE^:. 



Bentham and Hooker united this genus to Halesia, apparently on 

 insufficient grounds, for most botanists now concur in keeping the two 

 separate. They are really very distinct. Pterostyrax is exclusively 

 Chinese and Japanese (Halesia is East N. American) ; the inflorescence 

 is paniculate and many-flowered; the parts of the flowers are in fives 

 (fours in Halesia); the stamens are protruded in Pterostyrax (enclosed 

 in Halesia) ; the pith is continuous (chambered in Halesia). 



P. HISPIDUM, Siebold. 



(Bot. Mag., t. 8329 ; Halesia hispida, Masters.} 



A deciduous shrub, 15 to 20 ft. high, or a tree up to 30 or 40 ft. high, of 

 coarse, vigorous growth and spreading habit ; young shoots smooth. Leaves 



