64 COMMON CANADIAN WILD PLANTS. 



17. Amelaii elifer. Pome berry-like, 10-celled, i.e., with twice as many 

 cells as styles. Petals narrow. Otherwise as in Pyrus. Shrubs 

 or small trees, not thorny. 



I. PRUtfUS, Tourn. PLUM. CHERRY. 



1. P. America' na, Marshall. (WILD PLUM.) A thorny 

 tree 8-10 feet high, with orange or red drupes half an inch 

 or more in diameter ; and ovate, conspicuously pointed, 

 coarsely or doubly serrate, veiny leaves. Flowers white, 

 appearing before the leaves, in umbel-like lateral clusters. 

 Woods and river-banks. 



2. P. pu'mila, L. (DWARF CHERRY.) A small trailing 

 shrub, 6-18 inches high. Leaves obovate-lanceolate , tapering 

 to the base, toothed near the apex, pale beneath. Flowers in 

 umbels of 2-4, appearing with the leaves. Fruit ovoid, 

 dark red, as large as a good-sized pea. Crevices of rocks, 

 and sand-beaches and plains. 



3. P. Pennsylvan'iea, L. (WILD BED CHERRY.) A tree 

 20-30 feet high, or shrubby. Leaves oblong-lanceolate, 

 sharply serrate, green both sides. Flowers (appearing with 

 the leaves) in large clusters, the pedicels elongated. Fruit 

 globular, as large as a red currant, very sour. Rocky 

 thickets, and in old windfalls. 



4. P. Virginia' na, L. (CHOKE-CHERRY.) A good-sized 

 shrub, 3-10 feet high. Leaves oval, oblong, or obovate, finely 

 and sharply serrate, abruptly pointed. Flowers in short 

 erect racemes, appearing after the leaves. Fruit red, becom- 

 ing darker, very astringent. Woods and thickets. 



5. P. sero'tina, Ehrhart. (WiLD BLACK CHERRY.) A 

 large tree, with reddish-brown branches. Leaves smooth, 

 varying from oval to ovate-lanceolate, taper-pointed, serrate, 

 with short and blunt incurved teeth, shining above. Flowers 

 in long racemes. Fruit purplish-black, edible. Woods and 

 thickets. 



2. SPIILE'A, L. MEADOW-SWEET. 



1. S. Opulifo'lia, L. (Physocarpus opulifolius, Maxim.) 

 (NINE-BARK.) Shrub 3-7 feet high, the old bark separating 



