Explanation of Plate IV. 



42a. Puccinia substbiata Ell. & Barth. 



On Paspalum selaceum Michx., from Kansas. 

 Four uredospores and four teleutospores. 

 42*. Puccinia substriata Ell. & Barth. 



On Paspalum paniculatum L., from Mexico. 

 Four uredospores and six teleutospores. 

 42c. Puccinia substriata Ell. & Barth. 



On Pennisetum mexicanum Hemsl., from Mexico. 

 Four uredospores and five teleutospores. 

 42d. Puccinia substriata Ell. & Barth. 



On Pennisetum mexicanum Hemsl., from Mexico. 

 Two uredospores and six teleutospores. 

 43a. Uromyces halstedii De Toni. 



On Homalocenchrus virginicus (Willd.) Britt., from "Wisconsin. 

 Seven uredospores and five teleutospores. 

 44a. Puccinia majanth^B [Schutn.) Arth. csf Holw. 



On Polygonatum commutatum (R. & S.) Dietr., from Iowa. 

 Nine spermatia and five aecidiospores. 

 44*. Puccinia majanth^e (Schutn.) Arth. & Holw. 

 On Phalaris arundinacea L., from Michigan. 

 Five uredospores and three teleutospores. 



