454 



thecia about \ mm. diam., few, often only one or two in a spot, some- 

 times 6-8. Asci (p. sp.) about 40 x 6-7 /i, with a substipitate base. 

 Sporidia biseriate, subfusoicl, 7-10 x2J fi, 2-nucleate, becoming uni- 

 septate, hyaline. The ostiola project like slender, black bristles about 

 1 mm. long, but are easily broken off. This is very different from 

 Sphairella minimcepuncta, Cke., also on Gladiolus. 

 On dead stems of Gladiolus, Louisiana. 



C. Perithecia gregarious, buried in the bark, which is mostly black- 



ened on the surface, circumscribed (Tetrastaga). 



* On dicotyledonous plants. 



(a) Arboricolce. 



D. Neillise, Pk. 39th Rep. p. 52. 



Perithecia numerous, 250-270 p. diam., loosely and irregularly 

 aggregated in extensive patches, immersed in the inner bark, with 

 their bases often slightly sunk in the wood, covered by the epidermis, 

 which is pierced by the black, conical or rostellate ostiola. Asci sub- 

 cylindrical, p. sp. 55-75 x 7J-10 fi. Sporidia crowded or biseriate. 

 oblong or subfusoid, uniseptate and slightly constricted, 2-4 -nucleate, 

 12-17x5-7//. 



On dead branches of Neillia opidifolia, Albany, N. Y. 



The surface of the branch is rough to the touch from the project- 

 ing ostiola. The perithecia are sometimes clustered as in Valsa, and 

 often collapse below. 



D. Conradii, Ell. Am. Nat. March, 1883, p. 816. 



Exsicc. EH. N. A. F. 1 193. 



Perithecia scattered, minute, depressed-spherical, barely covered 

 by the epidermis, not penetrating the wood or limited by any black 

 line. Ostiolum cylindrical, straight, rough, black, abruptly pointed 

 above. Asci subcylindrical, 35-40 x 6-7 fi. Sporidia biseriate, ovate- 

 elliptical, uniseptate, hyaline, scarcely constricted, 6-8 x 2|-3 p.. 



On dead stems and branches of Hudsonia tomentosa, New Jersey. 



When the species was published in the Am. Nat., the host was 

 supposed to be Corema Conradii, hence the specific name. 



D. densissinia, Ell. Am. Nat. March, 1883, p. 316. (Plate 33) 



Exsicc. Ell. N. A. F. 1192. 



Perithecia minute (J mm.), black, buried in the unchanged sub- 

 stance of the inner bark mostly in groups of 15-50, their short, subulate 

 ostiola slightly converging, but not united, and barely penetrating the 



