140 TREES OF THE NORTHERN UNITED STATES 
ORDER XXXVIII. JUGLANDACEZ. 
(WALNUT FamILy.) 
A small order of useful nut- and timber-trees. 
Genus 81. JUGLANS. 
-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 sepa- 
rating from the very rough, bony nut; native. (A.) 
A. Upper axillary bud cylindrical, whitish with hairs; nut 
elongated. «ees, toy es Hy semi akQeuiciels, Soeebugeseee4 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. 
1. Jiglans cinérea, L. (BUTTER- 
NuT. WHITE WaLNUT.) Leaflets 11 
to 17, lanceolate, rounded at hase, 
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. 
