676 



OSTROPA, Fr. 



Summa Veg. Scaud. p. 401. 



Peritliecia immersed, orbicular. of M corky, horn-like texture, firm, 

 with a prominent papilla, rather large, with a longitudinal dehisrener 

 ;uid swollen li]s. Asci cylindrical. Sporidia lying parallel, closely 

 packed, typically filiform, multi septate or multiguttulate, hyaline, 

 Parapliyses slender. 



Placed by Dr. I\ehm among the Discomycetes, (Die Pilze III. 

 |>. 185). 



0. cinerea, (Pers.) 



Hysterium ciueieion, Pers. 83-11. p. 99, 

 Sphczria barbara, Fr. S. M. II, p. 468. 

 Exsicc. Moug. & Nest. 966. -Desm. PI. Crypt. Ed. I, 621. 



Peritliecia scattered, the base immersed in the wood or, more 

 rarely, in the bark, finally emergent, gray-cinereous, finally shining- 

 black, rather large, with a prominent papilla, depressed-spheroid, 

 opening with an elongated fissure extending nearly across. Asci 

 cylindrical or filiform, 180-200x7-10 //, thickened at the apex, 

 8-spored. Sporidia filiform, 180 x 1| //, umltiseptate, hyaline or yel- 

 lowish-hyaline. Paraphyses very slender, branching, evanescent. 



Fries, in S. M. II, p. 468, doubtfully refers to this species, speci- 

 mens on wood of Liquidambar from Carolina. 



A bout as large as a hemp seed. The conical or papilliform 

 ostiolum is rarely seen, the perithecium being generally split across 

 the top like a Hysterium. 



0. sphericities, Schw. Syn. N. Am. 1829. 



Peritliecia scattered or aggregated, but not confluent, rather large, 

 orbicular-elliptical, erumpent, subcompressed, black, sub rugose, open- 

 ing with a short transverse cleft, almost like the ostiolum of Tremato- 

 *l>]i<t'r!<t pertusa. 



On a piece of dry wood, New England (Torrey). 



0. rugnlosa, Schw. 1. c. 1830. 



Peritliecia arranged in long, effused, confluent groups, the single 

 perithecia scarcely distinct, carbonaceous, very black outside, brown 

 in<ide, striate-rimose, innate in the cinereous colored wood which is 

 raised into a tubercle, at length subdehiscent. The surface of the 

 perithecia is generally flattened and rugulose. 



On decorticated spots on a decaying log of Juglans cinerea, Erie 

 Co., Pa. (Schw.). 



