Pterocarya 437 



Section I. Cycloptera, F raLnchet, /oum. de Bot., 1898, p. 318. 



Fruit surrounded by an orbicular wing, composed of the connate bracteoles, 

 which cover the nutlet at the base. 



1. Pterocarya Paliurus, Batalin, Act. Hort. Petrop. xiii. loi (1892); Franchet, 

 loc. cit.] J. H. Veitch in Journ. R. Hort. Sac. 1903, xxviii. 65, fig. 26. China: 

 mountains of Szechwan, Hupeh, and Chekiang. 



Tree 40 feet. Twigs pubescent and glandular. Buds naked. Leaf-rachis 

 villous or pubescent, not winged. Leaflets seven, coriaceous, oblong- 

 ovate, with sub-acute apex, glabrous below except along the midrib. 

 Fruits samara-like, the nutlet in the centre of an orbicular wing, 2 inches 

 across, several on a raceme a foot long. 



This species was introduced in 1903 by Mr. E. H. Wilson from the 

 mountains of Central China ; and young plants, which seem perfectly 

 hardy, are now growing at Messrs. Veitch's Nursery, Coombe Wood. 

 The tree when in fruit presents a remarkable appearance, and is well 

 worth trial, as it should prove hardier than P. stenoptera, which grows at a 

 lower level. 



Section II. Diptera [Sectio nova). 



Fruit with two lateral wings, the developed bracteoles, which do not cover 



the nutlet at the base. 

 * Buds naked, without scales. 



2. Pterocarya stenoptera, C. DC. China, Tonking. 



Tree 60 feet. Twigs bristly - pubescent. Leaf-rachis winged. Leaflets 

 nine to twenty-five, coriaceous, underneath glabrescent with pubescent 

 tufts in the axils of the nerves. Fruit with long lanceolate upright glabrous 

 wings. In cultivation. See description below. 



3. Pterocarya Impehensis, Skan, Journ. Linn. Soc. (Bot.), xxvi. 493 (1899). 

 China: mountains of Hupeh. 



Small tree about 30 feet. Twigs glabrous. Leaf rachis not winged, 

 glabrous except for some tomentum near its insertion. Leaflets five to 

 nine, lanceolate ; under surface with brown scurfy scales and glabrous 

 except for stellate rusty tomentum in the axils of the nerves. Fruit 

 minutely glandular, with sub-orbicular wings, ^ inch diameter. Introduced 

 by Mr. E. H. Wilson in 1903. Young plants are now growing at Coombe 

 Wood and seem to be perfectly hardy. 



4. Pterocarya Delavayi, Franchet, yo7«7/. de Bot. 1898, p. 317. China: mountains 

 of Yunnan. 



This species, which I have not seen, appears closely to resemble the last, 

 differing mainly in the fruits being covered with short hairs. Not 

 introduced. 



5. Pterocarya caucasica, C. A. Meyer. Persia, the Caucasus. 



Tree attaining 100 feet. Twigs glabrous except for some pubescence at the 



