RHAMNACEAE. 



213 



PALIURUS. Jerusalem Thorn. 

 (Family Rhamnaceae). 



Shrubs or small trees, more or 

 less armed with unequal pungent 

 stipules. Twigs slender, zig-zag, 

 terete: pith small, rounded, pale, 

 continuous. Buds solitary, ob- 

 liquely sessile, ovoid with a half- 

 dozen pointed scales or the 

 smaller indefinitely scaly. Leaf- 

 scars alternate, 2-ranked, minute, 

 half-round, low: bundle-trace 1 

 or fragmented, indistinct: stipule- 

 scars minute and round or the 

 stipules forming short spines. 



Winter-character references: 

 Paliurus Aubletia. Shirasawa, 

 235, pi. 2. P. australis. Lubbock, 

 On Buds and Stipules, 194, f. 

 313, with suggestion that the 

 hooked stipule is an aid in scram- 

 bling; Schneider, f. 69. 



A gray-twigged Oriental jujube, 



Zizyphus Spina-Christi, like this shrub, has been given its 

 specific name because it has been taken to be the plant which 

 was used in making the biblical crown of thorns. 

 Puberulent: twigs brown. P. Spina-Christi. 



