20 ERYTHEA. 



straw-yellow (not chestnut-colored), compressed sporidia, 

 and from all tlie otlier graminicolous Pleosporce in its 

 elongated ostiola and perithecia. In some cases the elon- 

 gated perithecia have along their apex several round open- 

 ings, indicating several confluent perithecia. 



Pleospora diplospora, E. & E. 



On dead stems of Asdlepias incarnaia^ Eockport, Kansas, 



March, 1893. Bartholomew, No. 894, 



Perithecia scattered, convex - hemispherical, 150 — 220 /i 

 diam., covered at first by the thin cuticle, soon partially 

 erumpent and prominent, broadly pierced above, and often 

 with a distinct mycelial fringe of yellowish-brown hyphse 

 around the base. Asci broad, oblong-obovate, very briefly 

 stipitate, sparingly paraphysate, 8-spored, 70 — 80x25— 35/^, 

 broadly rounded above, Sporidia crowded-biseriate, 3-sep- 

 tate, compressed, and straw-yellow at first, becoming finally 

 5 — 7-septate, constricted at the septa and broAvn, 24 — 30x 

 10 — 15/i and 7 — 8/^ thick. The 3-septate sporidia are hardly 

 distinguishable from those of Pleospora permimda^ Cke., 

 except by their yellow color and differ so much in appear- 

 ance from the 5 — 7-septate sporidia as to make it difficult to 

 believe they belong to the same species, were it not that the 

 two forms of sporidia, with various intermediate grades, are 

 often found in the same perithecium. 



Leptosphaeria occidentalism E. & E. 



On dead culms of Panicum Criis-galU, Rockport, Kansas, 

 April, 1893. Bartholomew, No. 986, 



Perithecia scattered, subcuticular, finally semierumpent, 

 elliptical, 175 — 230x150 — 175>m, the papilliform ostiolum 

 piercing the epidermis, Asci clavate-cylindrical, 75 — 85 

 xl2 — 15/^, narrowed below into a short, stipe-like base, para- 

 physate, 8-spored. Sporidia biseriate, clavate-fusoid or 

 oblong-fusoid or cylindrical, curved, 5 — 8-septate, yellowish- 

 broAVB, finally almost opake, 25— 40(mostly 30)x7 — 8//. The 

 cylindrical sporidia have the ends obtuse and are distinctly 

 constricted at the septa, but the fusoid sporidia have the 

 ends subacute. 



