44 



A. diplodioides, B. & C. Grey. IT. p. 9. 



Spots orbicular, mycelium interrupted. Perithelia minute. 

 - ridia oblong, obtuse, uniseptate, light brown, 8 pt loi _ 

 On leaves of Andromeda acuminata. Alabama. 

 A. spurca, B. & C. Grev. IV, p. 9. 



- Perithecia scattered, dot-like, surrounded by short, articulated, 

 subnionilifonn, radiating threads, which are joined together laterally 

 in twos, sometimes forked at the apex." 



On leaves and stems of Hyptis radiata, Carolina and Alabama. 

 A. Wrigtatii. B. & C. Grev. IT, p. 10. 



- Mycelium very thin. Perithecia brown, granular, crowded, like 

 little grains of gunpowder, surrounded by cirrhate threads, 

 clavate, short," Texas (C. Wright.) 



"Apparently on some smooth Cucurbi 



A. eongregata, B. & C. X. Pac. Expl. Exp. p. 129. Xo. 169. 



Perithecia very small, shining, gregarious. Mycelium (subieu- 

 lum) very scanty, mouth round. Asci yellowish (** helvolus 7r ). Spo- 

 ridia narrow. 



On lea yes, Xiearagua. 



With the habit of Sph&rella moeulifoirmis. 



A. bnllata. B. & C. X. Pac. Expl. Exp. p. 129. Xo. 170. 



Spots orbicular, on projecting portions of the matrix, hyphae inter- 

 woven into a compact but thin, and here and there cellulose stratum. 

 Perithecia prominent, scutellate, margin fimbriate. 



On leaves, Xiearagua. 



With the habit of Strigula. 



A. ostiolata, B. & C. X. Pac. Expl. Exp. p. 129. Xo. 166. 



Punctiform, black. Ostiolum distinct, papilliform. Mycelium 

 reduced to a mere border around the perithecia ( t: subiculo nullo nisi 

 peritheciali.'i 



On the upper surface of leaves with Cephaleurus virescens, 

 Xiearagua. 



MICROTHYRIUM, Desm. 



Ann. Sci. Nat. XV. p. 137. 



Perithecia superficial, flat or plano-convex, membranaceous, per- 

 forated in the center, margin subfimbriate. Asci mostly oboyate. 

 8-spored, without paraphyses. Sporidia oblong or fusoid, continuous 

 or uniseptate, hyaline. 



