DICOTYLEDONOUS PLANTS 117 
4, P. virginiana, L. CHoxkecuEerry. A shrub or small tree, 
5-20 ft. high. Leaves thin, oval or obovate, pale, pointed, sharply 
serrate. Flowers small, white, in short racemes. Fruit bright red, 
turning at length to dark crimson, very puckery until fully ripe. 
River banks and thickets. 
5. P.serotina, Ehrh. Witp Biack CuEerry. Often becoming a 
large tree; bark on old trees rough, nearly black. Leaves rather 
thick, oval to lanceolate-ovate, acute or taper-pointed at the apex, 
finely serrate with calloused teeth, smooth above, downy on the veins 
beneath. Racemes terminal, long and spreading. Flowers white. 
Fruit globose, about + in. in diameter, purplish-black. In rich 
woods. Wood much used in cabinet-making.* 
6. P. Cerasus, L. Cuerry. Often becoming a large tree. 
Leaves oval or ovate, acute or taper-pointed at the apex, rounded at 
the base, irregularly serrate-dentate, smooth on both sides, resinous 
when young. Flowers in lateral umbels, white; pedicels long and 
slender. Fruit globose, red or black. This is the European species 
from which most of our cultivated varieties have been developed.* 
46. LEGUMINOSZ. Putse FAmMILy. 
Herbs, shrubs, or trees. Leaves alternate, usually com- 
pound (either pinnately or palmately), with stipules, the leaf- 
lets mostly entire. Calyx of 5 sepals, which are more or less 
united, often somewhat irregular. Corolla, of 5 petals, often 
Fic. 14.—I, Diagram of Flower of Sweet Pea, Lathyrus odoratus. II, Vertical 
Section of Flower (magnified). III, Calyx (magnified). 
Fic. 15.—I, Stamens and Pistil of Sweet Pea (magnified). II, Fruit. III, Part of 
Fruit, showing one seed. 
