102 TREES OF THE NORTHERN UNITED STATES 
Fruit large, usually obovate and mainly 
sunken at the large end; ripe July to Octo- 
ber, according to the variety. A pyram- 
idal-shaped tree, 30 to 70 ft. high, with 
smooth bark and often somewhat thorny 
branches. Of several hundred named va- 
rieties, native to Europe. Cultivated for its 
fruit. Wood slightly tinged with red; strong, 
and of fine grain. 
P. comminis. 
5. Pyrus cydonia, L. (Quince. Common 
QUINCE-TREE.) Leaves ovate, obtuse at base, 
entire, hairy beneath. Flowers solitary, large, 
1 in., white or pale rose-color. Fruit large, 
hard, orange-yellow, of peculiar sour flavor; 
seeds mucilaginous; ripens in October. A low 
tree, 10 to 20 ft. high, with a crooked stem and 
rambling branches; from Europe. Several varieties in cultivation. 
6. Pyrus pinnatifida, Ehrh. (OaK- 
LEAVED MounTaIn-asH.) Leaves pinnately 
cleft and often fully pinnate at basé, hairy 
beneath. Pome globose, 14 in., scarlet, 
ripe in autumn. A cultivated tree, 20 to 
30 ft. high ; from Europe. 
7. Pyrus Americana, DC. (AMERICAN 
MountTAIN-AsH.) Leaflets 13 to 15, lanee- 
olate, bright green, nearly smooth, taper- 
P. pinnatffida. pointed, sharply serrate with pointed teeth. 
Leaf-buds pointed, glabrous and some- 
what glutinous. Flowers white, 14 in., 
in large, flat, compound cymes. In June. 
Fruit berry-like pomes, the size of small 
peas, bright scarlet when ripe in Sep- 
tember, and hanging on the tree till win- 
ter. A tall shrub or tree, 15 to 30 ft. 
high, in swamps and mountain woods; 
more abundant northward. Often culti- 
vated for the showy clusters of berries in / 
autumn. P. Americana, 
8. Pyrus sambucifolia, Cham. & Schlecht. (ELDER-LEAVED 
Mountain -asH.) Leaflets oblong, oval or lance-ovate, obtuse 
