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MANUAL OF POISONOUS PLANTS 



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

 Meadow Oat Smut {Ustilago perennans). 



Fig. S6a. Porcupine Grass Smut (.Ustilago hypodites) affecting parts of inflorescence 

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



