(54) 



TETRADYNAMIA, 



I. Siliculosa, 



A. Fruit a % -articulate lomentum. 



1. Cakile. Both articles of the lomentum 

 anceps. 



B. Fruit a schizocarp. 



1. Senebiera. Silicula 2-seeded, margin 

 not winged. 



C. Fruit an indehiscent silicula. 



1. Thysanocarpus. Silicula 1-seeded, mar- 

 gin winged. 



D. Silicula regularly dehiscent, dor sally com- 



pressed, septum narrow. 



1. Lepidium. Cells 1-seeded. 



2. Capsella. Cells oo-seeded. 



E. Silicula regularly dehiscent, laterally com- 



pressed, septum broad. 



1. Alyssum. Cells 1-4-ovulate. 



II. Siliquosa, 



A. Siliqua indehiscent. 



1. Eaphanus. Siliqua moniliform. 



B. Siliqua regularly dehiscent. 



1. Cardamine. Siliqua laterally com- 

 pressed. Valves linear] without nerves. 

 Ovules in each cell oo ? 1-seriate. 



