453 



Habit that of Leptosphmria arundinacea. Very different from 

 Sphcena [Diplodia) ZecB, Schw.'" 



On dead culms of Zea Mays, Cincinnati, Ohio (Lea). 



On account of the raised spots, and broad-conical ostiola, this 

 seems distinct from D. Kelle,Tm.anniana, Winter, and from D. incon- 

 grua, E. & E. 



D. incongrua, E. & E. (in Herb.) 



Diaporthe Kellermanniana, Winter, in Journ. Mycol. II, p. loo (not Bull. Torr. 

 Bot. Club, X, p. 49). 



Stroma broadly effused, 5 or more centimeters long and nearly 

 surrounding the culm, which it penetrates and blackens on the inner 

 surface; the outside is also finely mottled with narrow-elliptical, dark- 

 colored spots about 1 mm. long, lighter in the center, and so numerous 

 and closely confluent as to cause the surface of the culm to appear, at 

 first sight, as if uniformly blackened. The whole area is limited by a 

 distinct black line, visible on the surface of the culm, especially at the 

 ends, where the stroma is often prolonged in narrow strips. Peri- 

 thecia scattered or subcespitose, sunk in the substance of the culm, 

 \-\ mm. diam., their long (1 mm.) rather crooked, black ostiola pro- 

 jecting, either singly or in little tufts of two or three together. Asci 

 lanceolate, about 40x7-8 /.(. Sporidia biseriate, obloug-fusoid, 4- 

 nucleate and yellowish, becoming constricted and uniseptate, ends 

 rather obtusely pointed, 7-10 x 3 /i. 



On decaying culms of Zea Mays, Kentucky and Louisiana. 



The distinct stroma will distinguish this from D. Kellermanni- 

 ana. Winter, and the cylindrical ostiola, from D. Maydis, Berk. 



D. Kellermannikna, Winter, Bull. Torr. Bot. Club, X, p. 49. 



Stroma none. Perithecia deeply immersed, depressed-globose, 

 membranaceous, black, 210-260 n diam., erumpent. Asci oblong- 

 fusoid, 8-spored, 35-40 x 5-7 //. Sporidia oblong, often inequilateral, 

 rounded or subacute at the ends, uniseptate in the middle, not con- 

 stricted, 4-guttulate, 9-11 x S-SJ ;z. 



On decaying culms oi Zea Mays, Lexington, Ky. (Kellerman). 



This seems quite distinct from either of the two preceding species. 



D. (iladioli, E. & E. Journ. Mycol. II, p. 101. 



Exsicc. EU. & Evrht. X, A. F. 2d Ser. 1794. 



Perithe-cia sunk in the substance of the stem just below the epi- 

 dermis, which is blackened above them, forming elliptical, definitely 

 limited spots 2-3 mm. long or, by confluence, 1 cm. or more. Peri- 



