CLASSIFICATIOX OF ANGIOSPERMS. 



515 



and a bicarpellary ovary with two long styles. After fertilization 

 the aments become cone-like, and this compound fruit constitutes 

 the hop of commerce. *This fruit differs essentially from the 

 true strobiles or cones of the Gymnosperms in that the seed in 

 the latter is replaced by an akene. " Hops " are extensively used 



Fig. 286. Hop vine (Humulus Lupulns): A, portion of branch with pistillate flowers 

 (f) and cone-like fruit (s) : B, portion of rachis of strobile with two scales enclosing akenes; 

 C, pistil; D, hair from rachis; E, epidermis of scale; F, longitudinal section of akene show- 

 ing coiled embryo; G, surface view of bract showing epidermis and cells containing calcium 

 oxalate; H, cystolith of leaf; I, cystolith of stem; J, glandular hairs (lupulin). 



in the manufacture of various beers and to a limited extent in 

 medicine. 



Ficus Carica, which yields the edible fig, is a deciduous tree 

 from 3 to 7 M, high, and with large, 5-lobed. petiolate leaves. 

 The flowers are situated in a hollow torus the walls of which 



