176 NATURAL HISTORY BULLETIN. 



time covered, and usually more abundant. The uredo- 



spores are thin-walled, closely 



and finely echinulate, and have 



four equatorial germ - pores . 



The specimens in this fascicle 



(36a) show only uredospores, 



as also does a specimen in the 

 Fig. 2. . L 



Puccini a polysora Und. From type herbarium of Mr. S. M. TraCV, 

 collected at Auburn, Ala., cct.1891. colkcted by him &t Mobile, 



Ala., Oct. 17, 1886, but the type collection, made by B. 

 M. Duggar at Auburn, Ala., Oct., 1891, shows both 

 uredo- and teleutosori. The irregular, thin-walled teleuto- 

 spores (fig. 2) are very different from the teleutospores of 

 the preceding species. 



37. PUCCINIA virgata E. & E. (1893. Proc. Acad. 

 Nat. Sc. Phila. :154). 



37a. On Chrysopogon avenaceus (Michx.) Benth. ii, III. Rooks Co. 

 Kans., Bartholomew. 



Orig. Desc. "III. Sori amphigenous, but more fully developed on 

 the lower side of the leaf, linear, often lcm. or more long', erumpent 

 and margined laterally by the ruptured epidermis, dark chestnut- 

 brown, almost black. Teleutospores mostly wedge-shaped or 

 clavate, but also some of them oblong, 40-70 X 18-22//, the upper 

 cell shorter and elliptical or subglobose and dark, the lower cell 

 longer, narrower, and lighter colored, apex rounded and obtuse 

 or subtruncate, and sometimes a little roughened. Epispore 

 thickened at apex but without any distinct papilla. Has a general 

 resemblance to P. graminis, but the spores are different." 



SYN : 



1834. Caeoma (Uredo) a ndropogi Schw. Trans. Amer. 

 Phil. Soc. 4:290. 



1896. Puccinia clavispora Ell. & Barth. Erythea 4: 79. 



1897. Uredo alabamensis Diet. Bull. Cornell Univ. 3 : 22. 



Sori amphigenous, but more abundant beneath, linear, 

 elongated, early naked, ruptured epidermis prominent. 



