G, 82) “ GLASSIFICATION AND DESCRIPTION . 141 
2. Juglans nigra, L. (BLack WAL- 
nut.) 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 Octo- 
ber. Alarge handsome tree, 50 to 120 ft. 
high, with brown bark; more common 
west than east of-the Alleghanies ; 
often planted. Wood dark purplish- 
brown. 
3. Jiglans régia, L. (Maperra 
Nur. ENGLisH WALNUT.) Leaflets 5 
to 9, oval, smooth, obscurely serrate. 
Fruit oval, with a thin-shelled oval 
nut not nearly so rough as that of 
Juglans cinerea, or of Juglans nigra. 
When ripe the husk becomes very 
brittle and breaks open to let out 
the nut. Tree intermediate in size, 
40 to 60 ft. high, hardy as far north as 
Boston in the East, but needs protec- 
tion at St. Louis. It should be more 
extensively cultivated. Introduced 
from Persia. 
Genus 82. CARYA. 
Hard-wooded trees with alternate, odd-pimnate leaves 
having straight-veined leaflets. The leaflets are oppesite 
each other, and the terminal pair and end leaflet are 
usually much thelargest. The sterile flowers are in hang- 
ing catkins, the fertile ones minute, forming a large, 
rounded, green-coated, dry drupe, with a roughened nut 
having a bony partition. The drupes hang on till frost, 
when they open more or less and usually allow the nut 
to drop out. Wood hard and tough, 
