418 



X ATUliAL HISTORY OF PLANTS. 



intense in the fresh state, recalls moreover a great many Diosmas 

 and Zanthoxylons by its opposite, trifoliolate, punctuate- glandular 

 leaves, and by its small flowers in cymes ; but these flowers, very 

 analogous to those of Esenbeckia, are remarkable for their tetramerous 

 type, valvate corolla, isostemonous androceum and carpels with free 

 ovaries surrounded by a disk and each containing an ascendent 

 subbasilar ovule with inferior and interior micropyle. 



The ovules are two in number, or still more numerous in the small 

 subseries Dictyolomeae, comprising two isostemonous genera : Dicf//o- 

 loma (figs. 478-483), consisting of American Quassias, with alternate 



Dictyoloma incanescens. 



Fig. 478. 

 Flower (±). 



Fig. 480. 

 Flower, perianth removed. 



Fig. 479. 

 Long. sect, of flower. 



.' 



'. 



Fig. 482. 

 Seed (f). 



Fig. 481. 

 Fruity). 



Fig. 483. 

 Long. sect, of seed. 



bipiunate leaves, polygamous flowers, with four or five ovules in each 

 free ovary, and capsular fruits, with seeds surmounted by a circular, 

 membranous, veined wing ; and Cneoridium, an American shrub, with 

 simple leaves and hermaphrodite, unicarpellary flowers, and two 

 ascending seeds in the ovary; also (?) an Australian cliplostemonous 

 genus, Cadettia, where the leaves are simple and tasteless, and the 

 free ovaries, from one to five in number, contain in the internal 

 angle from two to four descending ovules. 



