1. =Plátanus occidentàlis=, L. (AMERICAN SYCAMORE. BUTTONWOOD.) Leaves large (6 to 10 in. broad), roundish heart-shaped, angularly sinuate-lobed, the short lobes sharp-pointed, scurfy-downy till old. Fruit globular, solitary, 1 in. in diameter, hanging on long, 4-in. peduncles; remaining on the tree through the winter. A large, well-known tree, 80 to 100 ft. high; found on river-banks throughout; also cultivated. Wood brownish, coarse-grained; it cannot be split, and is very difficult to smooth. The marking of the grain on the quartered lumber is very beautiful. [Illustration: P. orientàlis.] 2. =Plátanus orientàlis=, L. (ORIENTAL PLANE.) Leaves more deeply cut, smaller, and sooner smooth than those of the American Sycamore. Fruit frequently clustered on the peduncles. This tree is similar to the American Sycamore, and in many ways better for cultivation. ORDER =XXXVIII. JUGLANDÀCEÆ.= (WALNUT FAMILY.) A small order of useful nut-and timber-trees. GENUS =81. JÙGLANS.= Trees with alternate, odd-pinnate leaves, of 5 to 17 leaflets, with 2 to 4 axillary buds, the uppermost the largest. Flowers inconspicuous, the sterile ones in catkins. May. Fruit a large, bony, edible nut surrounded by a husk that has no regular dehiscence. The nut, as in the genus Carya, has a bony partition between the halves of the kernel. * Leaflets 13 to 17, strongly serrate; husk of the fruit not separating from the very rough, bony nut; native. (=A.=) =A.= Upper axillary bud cylindrical, whitish with hairs; nut elongated 1. =A.= Upper axillary bud ovate, pointed; nut globular 2. * Leaflets 5 to 9; husk of the fruit separating when dry from the smoothish, thin-shelled nut; cultivated 3. [Illustration: J. cinèrea.] 1. =Jùglans cinèrea=, L. (BUTTERNUT. WHITE WALNUT.) Leaflets 11 to 17, lanceolate, rounded at base, serrate with shallow teeth; downy, especially beneath; leafstalk sticky or gummy. Buds oblong, white-to-mentose. Fruit oblong, clammy, pointed. A thick-shelled nut, deeply sculptured and rough with ragged ridges; ripe in September. A widely spreading, flat-topped tree, 30 to 70 ft. high, with gray bark and much lighter-colored wood than that of the Juglans nigra. [Illustration: J. nìgra.] 2. =Jùglans nìgra=, L. (BLACK WALNUT.) Leaflets 13 to 21, lanceolate-ovate, taper-pointed, somewhat heart-shaped and oblique at base, smooth above and very slightly downy beneath. Fruit globular, roughly dotted; the thick-shelled nut very rough; ripe in October. A large handsome tree, 50 to 120 ft. high, with brown bark; more common west than east of the Alleghanies; often planted. Wood dark purplish-brown. [Illustration: J. règia.]