734 



Perithecia scattered or loosely gregarious, at first sunk in the 

 matrix, at length emergent and even superficial, globose with a flat 

 base, clothed with stiff, black bristles standing out on all sides, but 

 especially around the conical ostiolum, black and tolerably large. 

 Asci oblong-clavate, substipitate, 8-spored, 200-230 x 44-52 fi. Spo- 

 ridia subbiseriate, oblong, attenuated at the ends and rounded, 3-sep- 

 tate, the second cell often a little broader, one or both the middle cells 

 generally divided by a longitudinal septum, yellow, slightly con- 

 stricted at the septa, 44-50 x 17-20 p. 



On rye straw, Bethlehem, Pa. (Schw.). 



Pyr. Penicillus, (Schmidt). 



Sphceria Penicillus, Schmidt, in Fr. S. M. II, p. 508. 

 Pleospora Penicillus, Fckl. Symb. Nachtr. II, p. -23. 

 Pyrenophora Penicillus, Sacc. Syll. 3852. 

 Exsicc. Fckl. F. Rh. 2522. 



Perithecia scattered or subgregarious, depressed-globose, covered 

 by the epidermis, surrounded at base by brown, undulate, creeping 

 hyphae, clothed above with stiff, black bristles which, on the ostiolum, 

 are collected in an acute or spreading, brush-like tuft, membranaceous, 

 dark brown, about 200 [i diam. Asci cylindrical, short-stipitate, 

 8-spored, 60-80x12-14 p.. Sporidia obliquely uniseriate, oblong, 

 ends rounded, constricted in the middle, 5-septate, with one (mostly 

 partial) longitudinal septum, deep yellow-brown, 15-17x8 fx. 



On dead stems of Humulus, Pennsylvania (Schw.). 



The diagnosis of this and the two preceding species are from 

 Winter's Pilze. 



Page 354. 



Leptosphaeria taxicola, Pk. 



In Pk. 39th Rep. p. 58, the sporidia are said to be hyaline, 20- 

 22 x 4-5 p 7 and the species is referred to Meta sphceria. 



Page 355. To habitat of Leptosphaeria Thalictri, add- 

 On Thalictrum polygamum, London, Canada (Dearness). 

 Page 361. After Leptosphseria Utahensis, insert 

 L. nigrella, (Rabh.) 



Cucurbitaria nigrella, Rabh. Hedw. 1873, p. 140, and 1887, p. 59. 



Perithecia innate-superficial, subglobose, constantly seated on 

 broad, black spots. Asci numerous, 80 u. long, sublinear-clavate from 

 a narrow base, 6-8-spored. Sporidia overlapping-uniseriate, honey- 



