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**Buds long, conical, beaked at the apex, enclosed during summer and autumn by a membranous funnel-like covering, composed of several scales.

6. Pterocarya macroptera, Batalin, Act. Hort. Petrop. xiii. 100 (1893). China: mountains of Kansuh.

Small tree, about 20 feet in height. Twigs glabrous. Rachis of the leaf not winged, rusty-tomentose. Leaflets nine to eleven, acute, rusty-tomentose on the midrib and nerves beneath. ruit: nut pubescent, wings broadly ovate, pilose, 1¼ in. long by 1 inch broad. Not introduced.

7. Pterocarya rhoifolia, Siebold et Zuccarini. Japan.

Tree, rarely attaining 100 feet. Twigs glabrous. Rachis of the leaf not winged. Leaflets fifteen to twenty-one; under surface glandular with tomentum along the midrib and veins and in their axils. Fruit, 1 inch wide; wings rhombic, broader than long, glabrous. Introduced. See description below.

 

PTEROCARYA CAUCASICA

 

Pterocarya caucasica, C.A. Meyer, Verz. Pflanzen Caucasus, 134 (1831); Loudon, Arb. et Frut. Brit. iii. 1452 (1838).

Pterocarya fraxinifolia, Spach, Hist. Nat. Veg. ii. 180 (1834); Lavallée, Arb. Segrez. Icones. 73, t. 21 (1885).

Pterocarya Spachiana, Lavallée, op. cit. 69, t. 20.

Pterocarya sorbifolia, Dippel (non S. et Z.), Laubholzk. ii. 327 (1892).

Juglans fraxinifolium, Lamarck, Encyc. Meth. iv. 502 (1797).

Juglans pterocarpa, Michaux, Fl. Bor. Am. ii. 192 (1803).

Rhus obscura, Bieberstein, Fl. Taur. Cauc. i. 243 (1808).

 

A tree attaining 100 feet in height and ro feet or more in girth, usually however smaller, and tending to branch into several stems at no great height above the ground. Bark dark grey and furrowed. Shoots glabrous. Leaves (Plate 125, fig. 1) 16 to 20 inches long, ona stalk 2 to 3 inches long, only slightly swollen at its base; rachis not winged. Leaflets fifteen to twenty-seven, opposite or subopposite, sessile or sub-sessile, 3 to 5 inches long; oblong or oblong-lanceolate; acute, acuminate, or obtuse at the apex; unequal and rounded or narrowed at the base; dark green above; under surface lighter green, without glands, glabrous except for some stellate pubescence along the nerves and in their axils; thin in texture; sharply and finely serrate. Staminate catkins several, each in the axil of a leaf-scar on the preceding year's shoot, rarely one or more on the current year's shoot; scale usually five-lobed, stamens twelve to fifteen. Fruiting catkins up to eighteen inches long.