PLANTS OF MANHATTAN AND BLUE RAPIDS 99 



Sisymbrium altissimum L. Tumbling Mustard. 



Along railroad. Occasional. June 10. 

 Sinapis alba L. White Mustard. 



Manhattan. Once collected in flax plot. 

 Brassica nigra (L.) Koch. Black Mustard. 



Roadsides. Frequent. May 15. 

 Brassica juncea (L.) Cosson. Indian Mustard. 



Along railroad. Frequent. 

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



Occasional; especially introduced in oats. May 15. 

 Enica saliva L. Roquette. 



Manhattan. Introduced in Turkestan alfalfa; first seen 

 in 1908. 



Roripa sinuata (Nutt.) A. S. Hitchcock. Spreading Yellow- 

 er ess. 



Low places. Common. Apr. 10 (12). 

 Roripa palustris (L.) Bess. Marsh Yellow-Cress. 



Low places. Frequent. May 5 (5). 

 Roripa sessiliflora (Nutt.) A. S. Hitchcock. 



River banks. Common. May 15 (14). 

 Roripa Nasturtium (L.) Rusby. Water Cress. 



In running water. One place at each locality; introduced. 

 Roripa Armoracia (L.) A. S. Llitchcock. Horseradish. 



Sometimes escaped from gardens. Apr. 25. 

 Cardaminc bulbosa (Schreb.) B. S. P. 



Manhattan. In wet places east of town. 

 Dcntaria laciniata Muhl. Toothwort. 



Manhattan. Woods on Deep Creek. Apr. 25. 

 ■Bursa Bursa- pastor is (L.) Britton. Shepherd's Purse. 



Roadsides. Common. Mar. 5 (7). 

 Camclina microcarpa Andrz. Small-fruited False Flax. 



Manhattan. Along railroad, 1909. May 5. 

 Draba caroliniana Walt. Whitlow Grass. 



Dry woods and fields. Common. Mar. 30 (29). 

 Draba cuneifolia Nutt. 



Manhattan. East of town. 

 Sophia intermedia Rydb. Tansy Mustard. 



Fields and roadsides. Common. Apr. 5 (4). S. incisa of 

 Hitchcock's list. 



