36 PLANTS OF MASSACHUSETTS. 



fleshy, sinuate, toothed, caducous ; flowers in July ; grows near 

 Boston, and on Cape Ann; see Bunias^ in Bigelow's " Flor. 

 Bost." p. 251. Common in Europe. 



Cardamine. L. 14. 2. 



C. Pennsylvanica. W. Water Cress. Stem about a foot 

 high in fruit, with smooth pinnate alternate leaves, and small 

 white flowers ; growing out of water, and beside water, or in 

 wet places ; pleasant spicy taste, and used by common people 

 as a cress ; flowers in June. 



Dr. Beck unites C. Virginiana, L., and the plant named above, 

 under C. hirsuta, L. It certainly is very difficult to find the 

 distinctions of the three species. The variety called C. virginica, 

 W., is found in Berkshire County. 



C. teres. Mx. Credited to the vicinity of Amherst College ; 

 is of little consequence, though interesting to botanists. 



The genus is named from the Greek, for heart- strengthener, on 

 account of its stomachic qualities. Loudon. 



Sisymbrium. L. 14. 2. 



The Greek name of an unknown plant. Loudon. 

 S. amphibium. L. Water Radish. A coarse plant with 

 small yellow leaves, growing in wet places, and flowering in June. 



S. nasturtium. L. English Water Cress. With pinnate 

 leaves, introduced from England. 



Barbarea. L. 14. 2. 

 B. vulgaris. R. Br. Winter Cress. Stem 1 -2 feet high, 

 branching ; leaves wing-like, and much-divided, and the terminal 

 division roundish, upper leaves undivided and dentate, and the 

 root leaves green through the winter ; sand and gravel of banks 

 of streams ; with yellow flowers ; May and June. Sometimes 

 called Water Rocket. 



Brassica. L. 14. 2. 

 Derived from the Celtic name of cabbage. Loudon. 



