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TETRADYNAMIA. 



I. Siliculosa. 



A. Fruit a '2-ariiculate lomentum. 



1. Cakile. — Both articles of the lomentum 

 anceps. 



B. Fruit a scJiizocarp. 



1. Senebiera. — Silicula 2-seeded, margin 

 not winged. 



C. Fruit an indeJiiscent silicula. 



1. Thj^sanocarpns. — Silicula 1-seeded, mar- 

 gin winged. 



D. Silicula regularly dehiscent, dorsaUij com- 



pressed, septum narroio. 



1. Lepidium. — Cells 1-seeded. 



2. Capsella. — Cells co-seeded. 



E. Silicula regularly dehiscent, laterally com- 



pressed, septum broad. 



1. Alyssum. — Cells 1-4-OTiilate. 



II. Siliquosa. 



A. Siliqua indeliiscent. 



1. Eaphanus. — Siliqua moniliform. 



B. Siliqua regidarly dehiscent. 



1. Cardamijie. — Siliqaa laterally com- 

 pressed. Valves linear] without nerves. 

 Ovules in each cell cx), 1-seriate. 



