393 



OPHIOBOLUS, Riess. 



Hedw. 1853, p. 27. 



Perithecia scattered, subsphaeroid, submembranaceons, covered or 

 Suberumpent. Ostiolum papillate or elongated. Asci cylindrical. 

 Sporidia filiform, guttulate or septate, hyaline or yellowish. Caulico- 

 lous or culmicolous. 



0. acurainatus, (Sow.) 



Sphceria acuminata, Sow. F,ng. Fungi, tab. 394, fig. 3. 

 Sphceria Carduorum, Wallr. Fl. Crypt. Germ. II. 805. 

 Ophiobolus disseminalns, Riess, Hedw. I, p. 27. 



Ophiobolus acuminatus, Duby, in Rab. Herb. Mycol. Ed. Il, No. 57. 

 Exsicc. Fckl. F. Rh. 780. Rab. F. F,. 1156, I437- Rehm Asc. 50. Thum. F. Austr. 476. 

 id. M. U. 358. Roum. F. Gall. 1849. 



Perithecia scattered, at first sunk in the matrix, with only the con- 

 ical or short-cylindrical ostiolum projecting, finally erumpent, and by 

 the falling away of the epidermis, superficial, about \ mm. diam., often 

 with mycelial hyphae around the base. Asci cylindric-clavate, 8-spored, 

 stipitate, 1213-150x8-10 /i, paraphysate. Sporidia filiform, multinu- 

 cleate, then multiseptate (15-20-septate), usually with one joint (near 

 the middle mostly) swollen, yellowish, 75-1 10 x 2 j 3 /*. 



On herbaceous stems : Erigeron, Campanula, Polygonum, Cir- 

 sium, Solanum and Lappa. 



Specimens on Cnicus lanceolatus, sent from London, Canada 

 (Dearness), have two of the joints swollen, dividing the sporidium into 

 three subequal parts. 



0. porphyrogonus, (Tode). 



Sphceria porphyrogona , Tode Fungi Meckl. II, p. 12, tab. IX, fig. 72. 

 Sphceria rubella, Pers. Syn. p. 63. 

 Rhaphidophora rubella, De Not. Sfer. Ital. p. 80, 

 Leptospora rubella, Rab. Herb. Mycol. 532. 

 Leptospora porphyrogona, Rab. Hedw. I, p. 116. 

 Rhaphidospora rubella, Fckl. Symb. p. 125. 

 Ophiobolus porphyrogonus, Sacc. Syll. 4017. 

 Fxsicc, Fckl. F. Rh. 787.--Kze. F. Sel. 79, 254. Rab. Herb. Mycol. 532. Rehm Asc. 94. 

 Thum. M. U. 561. EH. N. A. F. 191. SydoW M. March. 1358. Roum. F. Gall. 288. 



Perithecia scattered or oftener gregarious, and mostly on purplish- 

 red stains, at first buried, finally more or less eriun pent, globose-conical, 

 sometimes slightly depressed, with a flattened base, black, brittle, glab- 

 rous, with projecting, conical or cylindrical ostiolum, about 300 // 

 diam. Asci cylindrical, long and narrow, substipitate, 140-160x4|- 

 <] /i, 8-spored, paraphysate. Sporidia filiform, lying parallel, about as 

 long as the asci, multinucleate, then multiseptate, yellowish, about 1 p. 

 thick. 



On dead herbaceous stems: Solanum, Zea, Lactttca, &c, common. 

 50 



