ROSE FAMILY 125 



thick, oval to lanceolate-ovate, acute or taper-pointed at the apex, 

 finely serrate with calloused teeth, smooth above, downy on the veins 

 beneath. Eacemes terminal, long and spreading. Flowers white. 

 Fruit globose, about i in. in diameter, purplish-black. In rich woods. 

 AVood much used in cabinet-making.* 



2. P. yirginiana L. Chokeciierry. A shrub or small tree, 5 -20 ft. 

 high. Leaves thin, oval or obovate, pale, pointed, sharply serrate. Fl(jw- 

 ers small, white, in short racemes. Fruit 1> right red, turning at length 

 to dark crimson, ^'ery puckery until fully ripe. River banks and thickets. 



3. P. pennsylvanica L. i. AVild Red Cherry. A tree 20-30 ft. 

 high, with light, reddish-brown bark. Leaves oval or oblong-lanceo- 

 late, pointed, finely serrate, with both sides green, smooth and shin- 

 ing. Flowers long-pediceled, many in a cluster, the clusters lateral, 

 leafless. Fruit globose, very small, light red, with thin sow pulp 

 and globular stone. In rocky woods. 



4. P. Besseyi Bailey- AVesterx Sakd Cherry. A shrub 1-4 ft. 

 high, often with spreading and prostrate branches. Leaves usually 

 elliptic or oblong-elliptic, with appressed teeth. Flowers sessile in 

 lateral umbels, | in. to nearly | in. in diameter, opening with the 

 leaves. Fruit black, mottled, or yellowish, i— | in. in diameter, bitter 

 and astringent. Prairies W. 



5. P. Cerasus L. Cherry. 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. Culti\ated from Europe. This 

 is the species from which most of our sour cultivated varieties have 

 been developed.* 



B. Stone oval, compresatd : fruit smooth when ripe. Branches often 

 spiny. (Plums.') 



6. P. angustifolia ^larsh. Chickasaw Pluji. A small tree with 

 spiny branches. Leaves lanceolate or oblong-lanceolate, acute at the 

 apex, usually obtuse at the base, finely and sharply serrate, rather 

 thin, smooth. Flowers in lateral, sessile umbels, pedicels short. 

 Calyx smooth. Fruit yellowish-red, subglobose, skin thin, stone only 

 slightly compressed. In old fields S.* 



7. P. americana Marsh. Wild Pluji. A small tree, bark thick 

 and rough, branches spiny. Leaves ovate or obovate, acuminate at 

 the apex, rounded or cordate at the base, sharply serrate, rather 

 thick, downy beneath ; petioles glandular. Flowers in lateral, sessile 

 umbels, appearing with or before the leaves; pedicels \-\ in. long, 

 flowers J— J in. in diameter. Calyx downy within. Fruit globose, red 

 or yellow, ^-1 in. in diameter. Common in woods.* 



