KEY TO SMALL BUSHY FORMS OF PRUNES 145 



variety purple, one of the best purple-leaved plants in culti- 

 vation, especially in the South. Plhple-leavedPlum — Pru- 

 nus cerasifera atropurpurea (P. Pissardi). 

 A. Plant usually thorny ; fruit, if formed, smooth and glossy with- 

 out bloom ; twigs zigzag in growth ; leaves narrow and pointed, 

 1-2 inches long ; fruit | inch, orange-red with yellow flesh ; bush 

 6-10 feet high. Sand Plum* — Prunus angustifolia Watsoni. 

 A. Plant without thorns. (C.) 



C. Fruit, if formed, with dry inedible flesh splitting open and 

 letting out the stone when ripe ; a peach-like tree, 10-20 feet 

 high. There are double-flowered and weeping forms. Com- 

 mon Almond — Prunus Amygdalus. 

 C. Fruit smooth, small, globular, purple-red, very sour ; spreading 

 . bush 2-4 feet high often grafted on standard stock and used as 

 a weeping tree. Dwarf or Ground Cherry — Prunus fruti- 

 cosa and var. p^ndula. 

 C. Fruit smooth, globular, dark purple (i inch), abundant; bush 

 decumbent at base, but with erect twiggy stems 5-8 feet high. 

 Sand Cherry (200) — Prunus pumila. 

 C. Fruit very small, astringent ; small tree with drooping crooked 

 branches ; large pink flowers with notched petals, before the 

 leaves appear; calyx red. Rosebud Cherry or Japan Weep- 

 ing RosE-FLowERED Cherry — Pruuus p^udula. 

 • C. Fruit, if formed, covered with halj-s like a peach, i inch, yellow 

 with reddish cheek, not edible. Siberian Apricot — Prunus 

 sib^rica. 

 C. Fruit rarely formed ; flowers generally fully double, pink, rose- 

 colored, or white. (D.) 

 D. Leaves small, 2-3 inches long, pointed at both ends ; 

 bush 8-5 feet high ; flowers nearly 1 inch broad, usually 

 solitary. Russian Almond — Prunus n^na. 

 D. Leaves larger, very strongly veined beneath ; flowers 1-3 in 

 clusters before the leaves. Japan Almond (201) — Prunus 

 jap6nica. 

 D. Leaves broad and more or less 3-lobed, flowers solitary. 

 Flowering Pluji — Prunus trfloba. 

 Leaves deciduous ; flowers in elongated clusters. (E.) 

 E. Bush or tree to 30 feet ; flowers in clusters 2-4 inches long ; fruit 

 the size of peas, dark red and scarcely edible, stone smooth 

 There are dwarf and weeping forms. Choke Cherry (202) 

 — Prunus virgini^na. 

 E. Similar to above and with similar varieties, but the stone in fruit 

 is rough. European Bird Cherry (203) — Prunus P^dus. 

 afgar's shrubs — 10 



