RHAMNACEAE. 221 
ADOLPHIA.’ 
(Family Rhamnaceae). 
Intricately green- branched 
shrubs, very spiny by the decus- 
sate terete granular and puberu- 
lent branchlets: pith moderate, 
rounded, continuous. Buds super- 
posed, the upper at once develop- 
ing into a recurving spine-branch, 
the lower minute, with 2 outer and 
ultimately several inner  black- 
ening scales. Leaf-scars opposite, 
transverse, minute and indistinct, 
or lacking, the infra-spinal buds 
developing as short spurs on 
which the small spatulate leaves 
sometimes persist. 
In its opposite spines Adol- 
phia resembles Colletia, to which 
the genus is not distantly related; 
and it suggests Koeberlinia. 
Of Arizona, New Mexico and Mexico. A. infesta. 
Of Lower California. (1). A. californica. 
Winter-character references to Rhamnus:—R. alpina. 
Schneider, f. 169; Willkomm, 40, f. 64. R. cathartica. Bose- 
main, 48; Fant, 4h, £39; ‘Schneider, :f. 169; Ward, 1:46, Tf. 
28, 160, f. 76-77; Willkomm, 4, 45, f. 77. R. Frangula. Bose- 
mann, 49; Fant, 40, f. 36; Schneider, f. 101;; Ward, 1:215, f. 
110; Willkomm, 40, f. 66. R. japonica. Shirasawa, 268, pl. 
1. fh. tanecolata.. Brendel, 27, pli: 1: Hitehcoek:.43); "oii A. 
pumila. Schneider, f. 101. R. saxatilis. Bosemann, 48; 
Schneider, f. 169. R. utilis. Schneider, f. 169. 
