438 THE PLANT LIFE OF MARYLAND 



Cakile edentula (Bigel.) Hook. American Sea Rocket. 



Coastal Zone; on the strand; frequent. 

 Worcester County, Ocean City (1252). 



Sinapis alba L. White Mustard. 



Throughout the state; in cultivated grounds and waste places; common. 

 Introduced from Europe. 



Brassica nigra (L.) Koch. Black Mustard. 



Throughout the state; in cultivated grounds and waste places; common. 

 Introduced from Europe. 



Brassica arvensis (L.) B. S. P. Charlock. 



Throughout the state; in cultivated grounds and waste places; frequent. 

 Introduced from Europe. 



Barbarea barbarea (L. I MacM. Yellow Cress. 



Throughout the state; in cultivated grounds and waste places; common. 

 Introduced from Europe. 



Barbarea praecox (J. E. Smith) R. Br. Early Winter. 



Throughout the state; in cultivated grounds and waste places; frequent. 

 Allegany County, Cumberland (Howard Shriver). 



Roripa sylvestrix (L.)Bess. Creeping Yellow Water Cress. 



Baltimore County, Middle River (M. A. Chrysler). 



Roripa nasturtium (L.) Rusby. Water-cress. 



Throughout the state; in streams and open wet situations; common. 

 Introduced from Europe. 



Cardamine pennsylvanica Muhl. Pennsylvania Bitter-cress. 



Montgomery County, Great Falls (Joseph H. Painter). 



Cardamine purpurea (Torr.) Britton. Purple Cress. 



Throughout the state; in flood plains and moist forests. 

 Baltimore County, Soldiers Delight (1419). 



Cardamine rotundifolia Michx. Round-leaved Water-cress. 



Allegany County, Cumberland (Howard Shriver). 



Dentaria laciniata Muhl. Cut-leaved Toothwort. 



Infrequent in the Midland Zone; frequent in the Mountain Zone; in moist 



forests. 

 Baltimore County, Western Run (1404). 



Dentaria diphylla Michx. Two-leaved Toothwort. 



Rare in the Midland Zone; frequent in the Mountain Zone; in moist 



forests. 

 Garrett County, Kelso Gap (564). 



