RHAMNACEAE. 213 
Pattrurus. 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- 
sears 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 Aubdletia. Shirasawa, 
235, pl. 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. 
