DESCRIPTIVE MANUAL 



193 



Fig. 110-A. Distribution of Parosela. 



Rattle-box or Milk Vetch (Astragalus canadensis L.). 



Description.— A tall, erect, smooth or pubescent perennial, 1-4 

 ft. high; leaves compound, leaflets 21-27, oblong; flowers greenish 

 cream-colored in spike of variable length; pods crowded, smooth, 

 terete, occasionally somewhat sulcate; the seeds separate from the 

 pod, rattling, hence the common name. 



Distribution. — Common in the northern Mississippi valley, east 

 to New York and south to Georgia. Common on borders of thick- 

 ets, woods and native meadows. 



Extermination. — This weed is easily exterminated by cultivation. 



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