1UU TREES OF THE NORTHERN UNITED STATES 
Fruit as large as peas, purple-black, bitter; 
ripe in autumn. A fine tree, 15 to 60 ft. 
‘high, with reddish-brown branches. Wood 
reddish and valuable for cabinet-work. Com- 
mon in woodlands and along fences. 
Ree . 
——- ll. Praianus Virginiana, L. (CHOKE- 
+ CHERRY.) Leaves thin, oval-oblong or obo- 
ener runes vate, abruptly pointed, very sharply, often 
doubly serrate, with slender teeth. Ra- 
cemes of flowers and fruit short and close. 
Fruit dark crimson, stone smooth. Flowers 
in May; fruit ripe in August; not edible 
till fully ripe. A tall shrub, sometimes a 
tree, with gray- 
ish bark. River- 
banks, common 
especially north- 
ward. 
P. Virginiana, 
12. Prinus Padus, L. (SMALL Birp- 
CHERRY.) Like Prunus Virginiana, ex- 
cepting that the racemes are longer and 
drooping, and the stone is roughened. 
Occasionally planted for ornament. 
Gunus 37, PYRUS. 
Trees and shrubs, with alternate, stipulate, simple, or 
pinnately compound leaves. Flowers conspicuous, white 
to pink, apple-blossom-shaped (5 petals); in spring. 
Fruit a fleshy pome, with the cells formed by papery or 
cartilaginous membranes within juicy flesh. 
* Leaves deeply pinnatifid or fully pinnate (Mountain Ashes). .(A.) 
A. Leaf deeply pinnatifid, sometimes fully divided at the base .6. 
A. Leaf once-pinnate throughout. (B.) 
B. Leaf-buds pointed, smooth and somewhat glutinous..... Ts: 
B. Leaf-buds more or less hairy .... .-. -. ess 0 eee eeee 8, 9. 
* Leaves simple and not pinnatifid. (C.) 
C. Leaves entire; fruit solitary (Quinces) ................... 5. 
C. Leaves serrate; fruit clustered. (D.) 
D. Fruit large, sunken at both ends (Apples).......... eres | 
