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Rhamnaceae. 



Zizyphus. Jujube. 

 (Family Rhamnaceae). 



Shrubs or trees, more or less 

 armed with pungent stipules: de- 

 ciduous in the North. Twigs 

 terete, stout, with spurs bearing 

 clustered-scars and very slender 

 zig-zag shoots: pith small and 

 brownish and spongy, or larger 

 and continuous. Buds minute, 

 rounded, very obliquely sessile, 

 solitary, or in some species super- 

 posed, with several scarcely dis- 

 tinguishable scales, the end-bud 

 lacking. Leaf-scars alternate, 2- 

 ranked, minute, elliptical or tri- 

 angular, low: bundle-trace 1 or 

 fragmented, indistinct: stipule- 

 scars small and round, or the sti- 

 pules forming short spines. 



Winter-character references: 



Zizyphus sativa (Z. vulgaris). 



Schneider, f. 69; Shirasawa, 235, 



pi. 2. According to the belief of many people the food of the 



African lotus eaters was the fruit of a species of Zizyphus, 



which, in this belief, botanists have called Z. Lotus. 



1. Tomentose: spines stout, curved. (2). Z. Jujuba. 

 At most puberulent. 2. 



2. With slender spines, one straight. Z. sativa. 

 Unarmed. (1). Z. sativa inermis. 



