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MANUAL OF POISONOUS PLANTS 



Fig. 56. A. Oat Smut (Ustilago avenae). From U. S. Dept. of Agrl. B. Tall 

 Meadow Oat Smut (Ustilago perennans). 



Fig. 56a. Porcupine Grass Smut (Ustilago hypodites) affecting parts of inflorescence 

 and culm; a, spores, said by Dr. White to be an irritant. C. M. King. 



