.XVII. JUGLANDA CEE: PTEROCA‘RYA. 743 
Genus III. 
IN 
PTEROCA‘RYA Kunth. Tue Prerocarya. Lin. Syst. Monce‘cia 
? Polyandria. 
Identification. Kunth in An. Sciences Naturelles, 2. p. 346.; Lindley Nat. Syst. of Bot., p. 180. 
Synonyme. Jugians sp. Lin. 
Derivation. Pteron, a wing ; karua, the common walnut. The fruit has wings ; and, except in 
these, resembles that of the walnut. 
Gen, Char., §c. Flowers unisexual, moncecious.—Male flowers in_ spikes. 
Stamens in a flower many.—Female flowers in long pendulous spikes, and 
distant, sessile, and without bracteas. Calyx connate with the ovary. 
Ovary and part of the calyx flagon-shaped, bearing two wings above the 
base ; their direction transverse and oblique; cell 1; ovule 1, erect. Style 
1, very short. Stigmas 2, large, spreading, revolute. Fruit sub-drupa- 
ceous, angled ; having two wings, as the ovary ; much tapered to the tip, not 
opening ; containing a bony nut, which has 4 cells in its lower part, whose 
partitions do not extend to the top. (G. Don.) 
Leaves compound, alternate, exstipulate, deciduous ; leaflets about 17, 
sessile, unequal at the base, not dotted, serrate. Fruit small. Decaying 
leaves brown. — A tree, deciduous ; native of the eastern part of Caucasus ; 
propagated by layers, but the plant is somewhat tender. 
#1. P. cauca’sica Kunth. The Caucasian Pterocarya. 
Identification. Kunth in Annal. des Scien. Nat., 2. p. 346. 
Synonymes. Jiglans Pterocarya Miche. Fl. Bor. Amer. 2. p.192., Mey. Verz. Pflanz. Cauc. p.134.; 
Ehts obscdrum Bieb. Fl. Taur. Cauc. No. 606.; J. fraxinifdlia Lamond MS., N. Du Ham. 4. 
p. 182.; Frdxinus levigata Hort. Par. ; i 
Engravings. Our fig. 1431. from a seedling plant ; the plate of this tree in Arb. Brit., 1st edit., vol. 
vli.; and fig. 1432. from a plant in the Horticultural Society’s Garden. 
1451 P. cauedsica. 
Spec. Char., §&c. Leaflets, in a leaf, about 19; ovate-oblong, acuminate, 
argutely serrate, glabrous ; each with the lower or hinder side of its base 
attached to the petiole. (Laniarck.) A low deciduous tree. Mount Caucasus, 
in moist woods. Height 20 ft. to 40ft. Introduced in ? 1800. Flowers 
greenish ; May. end 
B 
