226 



SYSTEMATIC BOTANY. 



The Horse- 



about twelve hundred species, mostly herbs, with charaeter'- 

 istic, cruciform flowers, aud tetradynamous sta- 

 meus (Fig. 334). Brasdca oleraoea, originally a 

 wild European coast plant, has been cultivated for 

 a longtime, and given rise to the " varieties" called 

 Cauliflower (Fig. 335), Kale, Brussels-sprouts, 

 Cabbage, and Kohl-Eabi (Fig. 336). The various 

 kinds oflTurnips, Colza, and Eape have descended 

 from Brasdca campestris of Europe. The Radish 

 (Raphanus sativus) is a native of China, 

 radish (Nasturtium 

 Armorada') has also 

 been long cultiva- 

 '''ted for its roots, 

 which are used as a 

 condiment. White 

 Mustard {Brasdca j-j,,.^.., 

 alba) and Black V-£a^r.-j'; 

 Mustard {B. nig- 

 ra'), natives of Eu- 

 rope, are in common 

 use (ground seeds) as a condiment. The commonest culti- 

 vated representatives of the family 

 are Wall-flower (Chew-anthus), 

 Stock {Matihiold), Rocket (Sespe- 

 ris), Candy-tuft {Iberis), Honesty 

 (Lunana), Sweet Alyssum, etc. 

 Among the weeds are Shepherd's- 

 Purse (Capsella Bursa-pastoris), 

 836 Peppergrass {Lepidiuin), False 







335 



Fig, 334. Tetradynamous stamens; aa, long stamens; b b, short stamens. Fig. 

 836. Cauliflower. Fig. 336. Kohl-Rabi. 



