CRUCIFER^ 



347 



slightly curved, on pedicels 

 of equal length, and bear 

 a few seeds in two rows. 



Geographical. — Water cress is 

 a native of Europe and Northern 

 Asia, but has become naturalized 

 in both North and South Amer- 

 ica. It is widespread in North 

 Ar^ierica. 



References 



Carriere, E. a.: Une nouvelle 



plante fourragere at econom- 



ique. Journ. d'Agric. Prat. 



Annee, ^^t tome ii: 845-847, 



1869. 

 GoFF, E. S.: Vegetables: Turnip- 



6th Ann. Rept. N. Y. Agr. 



Exp. Sta., 168-190, 1887. 

 Henslow, G.: The History of 



the Cabbage Tribe. Jour. 



Roy. Hort. Soc. (London), 



34: 15-23, 1908-1909. 

 Shaw, T.: The Rape Plant: Its 



History, Culture, and Uses. 



U. S. Dept. Agr. Farmers' 



Bull. 11: 1-20, 1893. 



Fig. 



145. — Water cress (Radicula nas- 

 turtium-aquaticum) . 



