I2 4 CRUCIFER^:. [CLASS 



OBSERVE the spuriously lateral racemes of Lesser Wart- 

 Cress (Senebiera didyma), an exotic weed, introduced in 

 waste ground in the South of Englahd. The racemes 

 are, as is usual in the Order, really terminal, but the 

 axillary bud given off below each raceme soon overtops 

 it : the axillary bulbels of Coral-wort (Dentaria bulbifera) : 

 the spurious septum which usually divides the ovary of 

 Crucifers into 2 cells, developed from the cellular tissue 

 of the opposite parietal placentas, the lobes of the 

 stigma being opposite to the placentas. 



Compare the long capsule of Wallflower (a siliqua] ; 

 the short capsule of Shepherd's-purse (a siliculd} ; the 

 siliqua of Radish, an indehiscent and jointed lomen- 

 taceous siliqua ; and the i -seeded fruit of Dyer's Woad 

 (Isatis tinctoria). 



Compare, with regard to the relation of the septum to 

 the greater or smaller diameter of the fruit, Honesty 



FIG. 82. Capsule (silicula) of Shep- FIG. 83. The accumbent embryo 



herd's-purse (Capsella), showing of Wallflower, 



one valve removed, and the seeds 

 attached by their funicles to the 

 replum or frame uniting the 

 valves, and which remains after 

 they fall. 



(Lunarid) with a broad septum, and Shepherd's purse 

 (Capsella} with a narrow septum : also the exalbuminous 

 seeds of Wallflower, having the radicle curved over the 

 edges of the cotyledons (accumbenf) ; of Sisymbrium, 

 with the radicle curved over the back of one of the coty- 

 ledons (incumbent}; of Radish, the same with the 

 cotyledons folded ; and the often trificl cotyledons of" 

 Garden Cress (Lepidium sativuni). 



