109 



latum, B. & Rav.^ appearing under the lens like punctures 

 made by the point of a pin. The fruit is scarcely different 



from that of the preceding species. 



In this and the next species, the part of the culm 

 occupied by the perithecia is uniformly blackened. 



Leptosphaeria marina, E. & E. — Perithecia irre- 

 gularly scattered, subeiliptical (^2 — ^/4 mm)^ upper part 



hemispheric-conic , projecting , closely covered by the 

 blackened epidermis, apex subtruncate with a papiliform 

 ostiolum which is soon deciduous, leaving a broad opening. 

 Asci 112—150 X 25—35 jW, narrowed into a substipitate 

 base. Sporidia 2 — 3-seriate, fusiform or clavate - fusiform, 

 yellowish, 1 — 3-soptate (mostly 1-septate), slightly constricted 

 ad the middle septum, 50—60 x 10—12 ^u, ends subobtuse. 

 In this case, the greater number of septa does not seem to 

 indicate maturity. The perithecia are more prominent and 

 the sporidia nmch longer than in L. discors, S. & E. 



This and the two pi^eceding species were collected 

 during the summer of 1884, by Mrs. Caroline Treat at Cape 

 May, N. J.^ on dead culms of Spartina lying on the beach. 



Leptosphaeria clavicarpa, E. & E. — Perithecia 

 mostly seriate in lines ^^ — 1 cm long, covered by the 

 blackened epidermis which is raised into a ridge above 

 them and perforated by the inconspicuous ostiola. Asci 

 broad, oblon;?-cylindrical, 75 — 100 x 22—25 fi obtuse, with 



a short, narrow base. Paraphyses filiform, Sporidia crowded 

 in several series, clavate-oblong, slightly curved, obtuse and 

 rounded above, narrowed rather abruptly below, 7 — 9 septate, 

 and when mature, deep yellow-brown, 25 — 40 x 8—10 ft, 

 only slightly constricted at the septa. Spcrmatia in similar 

 perithecia, oblong - cylindrical, slightly curved , hyaline, 



3—5 X P/4 fi. 



The general appearance is that of Sphaeria ortho- 

 gramma, B. & C. Leptosphaeria culraifraga (Fr.) 

 has longer, narrower sporidia, and the perithecia are not 

 usually so distinctly seriate. Found on dead culms of 



Phragmitis communis, at Spirit Lake, Iowa, Jan. 1884, 

 by Prof. J. C. Arthur. 



Sphaerella Thalictri, E. <fe E. — Perithecea hypo- 

 phyllous, 90 ^ in diameter, of coarse, cellular structure, 

 with a rather large opening above, hemispheric (flattened 

 when dry), scattered on small (2 — 3 mm), round, white 

 spots with a dark border. Asci sessile, about 36 x 7 /u. 

 Sporidia crowded, ovate - oblong, granular and nucleate 

 (becoming uniseptate?) 12 — IG x 3— 4^/2 /*. 



