1896.] G. King — Materials for a Flora of the Malayan Peninsula. 371 



Fruit superior. 



Armed trees or shrubs ; fruit drupaceous ... 1. Zizyphus. 



Fruit half inferior. 

 Unarmed erect shrubs ; fruit dry, 3-celled, 

 3-seeded ... ... ... ... ... 2. Colubpjna. 



Scandent unarmed shrubs ; fruit dry, 1-celled, 

 1-seeded (by abortion), epicarp prolonged into a 

 long apical wing. 



Fruit indehiscent, apical wing not splitting 3. Venttlago. 



Fruit dehiscent, apical -wing splitting at 



least at the base ... ... ... 4. Smyth ea. 



Fruit inferior, crowned by the persistent calyx, 



3- winged or triquetrous ... ... ... 5. Gouania. 



1. Zizyphus, Juss. 



Trees or shrubs, often decumbent or sarmentose and usually armed 

 with sharp, straight or hooked prickles (transformed stipules). Leaves 

 alternate, 3-nerved, usually coriaceous. Flowers fascicled, or in sessile 

 or pedunculated cymes. Calyx 5-fid ; lobes spreading, keeled within ; 

 tube broadly obconical. Petals 5, rarely 0, cucullate, deflexed. Di.sc 

 5-10-lobed, flat or pitted, with a free margin. Stamens 5. Ovary sunk 

 in the disc and confluent with it at the base, 2-4-celled ; styles 2-4, 

 free, or more or less united. Fruit fleshy or dry, with a woody or bony 

 1— 4-seeded 1-4-celled stone. Seed plano-convex, albumen 0, or very 

 scanty. — Distrib. Species about 60, found in tropical Asia and America, 

 and in the temperate regions of both hemispheres. 



Leaves pubescent underneath. 



Leaves uniformly tomentose beneath, broadly 

 ovate or sub-orbicular, blunt ; drupe glabrous, 

 with much pulp and bony endocarp ... ... 1. Z. Jujuba. 



Leaves rusty-pubescent beneath, ovate lanceolate, 

 oblique, acute ; drupe glabrous, with scanty pulp 

 and leathery endocarp ... ... ... 2. Z. Oenoplia. 



Leaves rusty-pubescent beneath, elliptic-oblong, 

 acute or shortly acuminate, cordate ; drupe 

 rufous-tomentose, with thin pulp and bony 

 endocarp .., ... ... ... 3. Z. Kunstleri. 



Leaves sparsely pubescent beneath, ovate-lanc- 

 eolate, oblique, bluntly acuminate ; drape gla- 

 brous, with thin pulp and leathery endocarp ... 4 Z. elegans. 



