PASSIFLORALES. 



521 



with parietal placentas (sometimes three or more celled by 

 the produced placentae). 



Order Datiscaceae. A mrious order of four species, one of which, 

 Datisca glomerata, occurs in California. 



Order Begoniaceee. A tropical order of 350 species of herbs, mostly 

 FIGS. 461-5. ILLUSTRATIONS OP CUCUMIS MBI.O. 



Fig. 461. Male flower, vertical section. 

 Fin. 462. Female flower, vertical section. 

 Fig. 464. Diagram of male flower. 



FIG. 465. 



Fig. 463. Andrcecium. Magnified. 

 Fig. 465. Diagram of female flower. 



American, represented in green-houses and conservatories by many 

 species of the principal genus Begonia e.g., B. Rex, B. Evansiana, B. 

 fuchsioides, etc. 



Order Cucurbitaceee. The Gourd Family. Herbs or undershrubs 

 with climbing or trailing stems and diclinous flowers ; placentae pro. 

 duced to the axis of the ovary and revolute. Species 470, mostly 

 tropical. (Figs. 461-5.) 



