202 IlUnois Sfafc Lahoratonj of Nattiyal Hlsfori/. 



P. flaccida, R. c^ Br. 



II., III. Ampliigenous. Sori small, oblong to linear, 

 often confluent, at length rupturing tlie epidermis, reddish-fer- 

 ruginous. Uredospores vary from elliptical to subglobose, the 

 latter about 25 /*, furnished with two or more hyaline points 

 (germinal pores?), sharply echinulate, cinnamon-colored. Te- 

 leutospores exceedingly variable, often undivided, the septum^ 

 when present, transverse, oblique or longitudinal, equally, or in 

 every degree unequally, dividing the spore. The simple ones 

 are usually clavate, the divided ones vary from clavate to sphe- 

 roidal, regularly formed or much constricted, and lobed with 

 one or two thickened apical points, length about 80-40;u. light- 

 er colored than the uredo; pedicel hyaline, once or twice the 

 length of the .spore. 



Sori small, short; spores flaccid, with a long hyaline pedicel, ob- 

 tuse, contracted in the middle. — Berkeley, Jour. Linn. Soc, Vol. XIV., 

 p. 91. 



On Panicum cnis-ijidli: Henry and Rock Island, Sept. 28, 

 1701, IT., III., 1716, li., III.; Champaign, Oct. 19, 6329, II., 

 III., Oct. 24, 6334, II., III. 



A most peculiar species. From two thirds to three fourths 

 or more of the teleutospores are septate, presenting the most 

 varying and aberrant forms. So far as we are informed this 

 has not been previously found in America, but a comparison 

 with specimens kindly furnished by Dr. M. C. Cooke, of Puc- 

 cinia flaccida, B. & Br., from Ceylon, leaves no doubt of the 

 specific identity. The American specimens only differ in pos- 

 sessing more undivided, and upon the average, narrower teleu- 

 tospores, with somewhat thicker pedicels. 



P. andropogi, Schw. 



II., III. Hypophyllous. Sori rather small, usually very 

 numerous, elliptical, sometimes confluent in small, elongated 

 groups, soon naked, surrounded by the lacerated remains of the 

 epidermis; uredospores subglobose, epispore rather thick, tuber- 

 culate, 21-30;w; teleutospores mostly obovate, but varying to 

 elliptical and clavate, slightly constricted at the septum, usually 

 thickened at the vertex, obtusely rounded or sometimes short- 



