PLATE 21 



A.— Infection produced upon Thalictrum sp. (98) inoculated with Puccinia triticina 

 from Colton, Wash. (16519). 



B. — Infection produced upon Thalictrum sp. (98) inoculated with Puccinia triticina 

 from Canton, Miss. (8719). 



' C. — Infection produced upon Thalictrum flavjim (53) inoculated with Puccinia iriii- 

 ana from Hickory, N. C. (7219). 



D. — Infection produced upon Thalictruin sp. (55) inoculated with Puccinia triticina 

 from Hickory, N. C. (7219). 



(172) 



