172 STATE HOKTICULTUBAL SOCIETY 



2215. R. hispida, (Desv.) Britton. Hispid Yellow Cress. 

 Frequent. 



2216. R. nasturtium* (L.) Rusby. Water Cress. 

 In clear streams. 



2217. R. sessiliflora, (Nutt.) A. S. H. Sessile Flowered Cress. 

 Infrequent. 



2218. R. armoricia, L. Horse Radish. 

 Escaped from gardens. 



Cardamine, L. 



2219. C. liirsuta, L. Hairy Bitter Cress. 

 Wet places, frequent. 



2220. C. pennsylvanica, Muhl. Pennsylvania Bitter Cress. 

 Frequent. 



2221. G. parviflora, L. Small Flowered Bitter Cress. 

 Not common. 



2222. C. flexuosa, With. Wood Bitter Cress. 

 Not common. 



2223. C. purpurea, (Torr.) Britton. Purple Cress. 

 Not frequent. 



2224. C. bullosa, (Schreb.) B. S. P. Spring Cress. 

 In bogs. 



Dentaria, L. 



2225. D. laciniata, Muhl. Pepper Root. 

 Rich woods. 



2225a. D. diphylla, Michx. Two-leaved Toothwort. 

 In rich soil, not common. 

 Bursa, Weber. 



2226. B. bursa-pastoris, (L.) Britt. Shepherd's Purse. 

 A very common introduced weed. 



Camelina, Crantz. 



2227. 0. sativa, L. False Flax. 

 An introduced weed. 



Draba, L. 



2228. D. caroliniana, Walt. Carolina Whitlow Grass. 

 In sandy places. 



