PRUNUS RUBUS 



389 



538. Prunus angustifolia. 



oblong-ovate, dull and soft, on the young growth hanging: fruit usually 

 rather large, sweet. Europe. 



aaaa. Wild cherries, with small, scarcely edible fruits: 

 flowers umbellate or racemed. 



P. pennsylvanica, Linn. Wild red cherry. Pin or bird cherry. Small 

 tree, 20-30 ft. high, with red-brown, 

 peeling bark: flowers small, white, on 

 long pedicels in umbel-like clusters, 

 from lateral scaly buds, in early spring, 

 before or with the leaves: fruit very 

 small, globose, red, smooth, with thin, 

 sour flesh. 



P. virginiana, Linn. Choke cherry. 

 Small tree or shrub, 5-20 ft., with 

 grayish spotted bark: leaves thin, oval 

 or obovate, abruptly acute at tip, 

 sharp-serrate: flowers white, in short 

 racemes, terminating leafy branches, appearing after leaves in late spring: 

 fruit small, globose, red changing to dark crimson (nearly black), very 

 astringent: usually found along banks and in thickets. 



P. serotina, Ehrh. Wild black cherry. Tree, 50-80 ft., with black, rough 

 bark and reddish brown branches: leaves thickish, oblong or oblong-lanceo- 

 late, acute or tapering at tip, serrate with incurving or bluntish teeth: flow- 

 ers later than preceding, white, in elongated, drooping or spreading, termi- 

 nal racemes: fruit deep purple or black (J^ in. in diameter) with a sweetish, 

 bitter taste. 



6. RtTBUS. BRAMBLE. 



Shrubs, usually thorny, the canes or shoots dying after fruiting, with 

 alternate digits tely compound leaves: flowers white, in Clusters, with 

 5-parted calyx and 5 petals: ovaries many, ripening into coherent drupelets. 



a. Raspberries: drupelets or berry separating from the torus. 



R. occidentalis, Linn. Black raspberry. Figs. 142, 

 290. Canes long and thorny, glaucous, rooting at the 

 tips late in the season: leaves of mostly 3 ovate 

 doubly-toothed leaflets: flowers in close, umbel-like 

 clusters: fruits firm, black (sometimes amber-color). 

 Woods, and common in cultivation. 



R. aculeatissimus, C. A. Meyer. Red raspberry. 

 Canes erect and weak-prickly, more or less glaucous, 

 not rooting at tips, leaflets oblong-ovate: flowers in racemes: fruits soft, 

 red. Woods, and cultivated. 



R. odoratus, Linn. Flowering raspberry. Flowering "mulberry." Shrubby 

 and erect, branching, 3-5 ft., not prickly, but rather bristly and sticky- 

 hairy: leaves large, 3-5-lobed: flowers large, 1-2 in. broad, in terminal 



Prunus Avium. 



