144 UNIVERSITY OF MISSOURI STUDIES [286 



428. B. juncea (L.) Cosson. Indian mustard. 

 Yards; locally common. 



Europe and Asia, thence to eastern North America, the 

 West Indies, and South America. 



429. B. Japonica Siebold. Japanese mustard. 

 Waste places; uncommon. 



Eastern Asia, thence to North America. 



430. B. Sinapistrum Boiss. [B. arvensis (L.) B. S. P.]. 

 Charlock. 



Fields and waste places. 



Europe and Siberia, thence to North America. 



431. B. campestris L. Ruta-baga. 

 Waste places, and persisting in fields. 

 Old World, now universal in cultivation. 



431a. B. campestris rapifera Metzg. Turnip. 

 Adventive in waste places. 

 Old World, now universal in cultivation. 



432. B. napus L. Rape. 

 Occasionally adventitious in fields. 

 Adventitious from Europe. 



171. RAPHANUSL. Radish. 



433. R. sativus L. Garden radish. 

 Persisting in gardens. 



Europe, now universal in cultivation. 



172. BARBAREA R. Br. Winter cress. 



434. B. vulgaris R. Br. {B. Barbarea (L.) MacM.]. Yel- 

 low rocket. 



Waste grounds, preferring moist soil. 

 Europe and Asia, now almost cosmopolitan. 



435. B. stricta Andrz. \B. vulgaris striata (Andrz.) Gray]. 

 Winter cress. 



Roadsides; frequent. 



Europe and Asia, thence to North America. 



