CLEMENTS 



PLATE 39 



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A. Grass assooies, Andropogon-Calamovilfa-pois (A. scoparius, C. longijolia), 

 Crawford, Nebraska. 



B. Ruderal assooies Cleomc-Semcio-chledis {C. serrulata, Senecio douglasii), Sidney, 



Nebraska. 



