CLASSIFICATION OF ANGIOSPERMS. 



305. 



in axillary cymes ; the fruit is a black, 2-valved capsule. A'. Clava- 

 Herculis or the southern prickly ash is a very prickly shrub, which 

 is characterized by having cork-wings on the bark. The leaves 

 are 5- to 17- foliate, the leaflets being ovate and crenulate ; the 

 flowers are in terminal racemes and have a calyx of 4 or 5 sepals, 



Fig. 157. Species of Pilocarpus: A, branch of P. Selloanus showing determinate 

 inflorescence; B, flower of the same; C, fruit of P. giganteus; D, seed of P. macrocarfus; 

 E-J, P. finnatif alius, — E, flower; F, transverse section of leaf; G, surface view of lower 

 epidermis; H, part of a fruit; J, longitudinal section through seed.— F, G, after A. Meyer; 

 the remainder after Engler. 



the calyx being wanting in X. americanum. The bark of these 

 two species is official (p. 532). 



Pilocarpus. — To this genus belong a number of species which 

 are shrubs or small trees and indigenous to tropical America. 

 The leaves are mostly pinnately-compound, the leaflets being 

 coriaceous and entire; the flowers are small, greenish and in 



