ARTIFICIAL KEY TO THE FAMILIES. liii 



Ovary 2-celled : 



Fruit not opening elastically, rarely inde- 

 hiscent : 



Seeds small or minute, not winged ; leaves 

 simple, sometimes very deeply lobed ; 

 herbs or shrubs : 



Ovules many on placentas attached to 

 the middle of the septum ; seeds almost 

 always albuminous 



CVII. SCROPHULARIACEAE. 



Ovules attached singly or 1-seriately 

 under the leaves of a projecting parietal 

 2-bladed placenta ; or with 2 ovules in 

 each cell ; or the 2 cells spuriously 

 4-celled by the intrusion of a false sep- 

 tum with many ovules attached singly 

 or 2-seriately to the inner angles ; seed 

 not albuminous . . . .CXII. PEDALIACEAE 

 Seeds rather large, transverse, with broad, 

 membranous or hyaline wings ; or if not 

 winged, then trees with imparipinnate 

 leaves; embryo horizontal; fruit caps ular; 

 leaves compound. . .CXI. BIGNONIACEAE. 

 Fruit opening elastically from the apex of 

 2 loculicidal valves ; seeds usually supported 

 on upcurved processes from the placentas ; 

 leaves simple, opposite 



CXIII. ACANTHACEAE. 



Carpels 1-ovuled ; or if 2-ovuled, then ovules 

 collateral, not superposed and fruit indehiscent, 

 1 -seeded ; leaves opposite or whorled : 



Fruit not 4-lobed ; or if 4-lobed, then drupa- 

 ceous ; or if separating into nutlets, then ovary 



entire CXIV. VERBENACEAE. 



Fruit separating into 4 distinct nutlets or, less 

 often, drupes, rarely 4-lobed and not separating, 

 and then not drupaceous ; ovary always 



4-lobed CXV. LABIATEAE. 



Corolla rarely present and calyx often absent, sometimes perianth 

 altogether lacking ; flowers more often 1- than 2-sexual ( Mono- 

 chlamydeae) : 



