140 TREES OP THE NORTHERN UNITED STATES 



ORDER XXXVIII. JTTGLANDACE-ffi. 



(WALNUT FAMILY.) 



A small order of useful nut- and timber-trees. 



GENUS 81. 



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 dehisceiice. 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 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. Juglans cin&rea, L. (BUTTER- 

 NUT. 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. 



