33 



dusky cells 10-12 p diam. Asci ovate or borate, 8-spored. Spo- 

 ridia ovate-oblong, 33-r35 x 15-18 p, hyaline at first, then light brown. 



On leaves of Ilex cbriacea and I. opaca, Carolina to Florida. 



D. erysipheoides, E. & E. Journ. Mycol. IV, p. 121. (Plate 8) 



Exsice. EH. & Evrht N. A. F. 2d Ser. 2341. 



Amphigenous. Perithecia scattered, astomous, globose, 100-130 

 p diam., sparingly clothed with short (30-40 x 3 p), erect, spreading 

 hairs, and seated on a rather scanty mycelium of slender, brown, 

 branching hyphae. Asci oblong, subsessile, 35-40 x 12-14 /^ with fili- 

 form paraphyses. Sporidia biseriate, acutely elliptical, uniseptate and 

 constricted, each cell with a large nucleus, 15-18 x 6-7 p. 



On leaves of Cynodon dactylon, Louisiana (Langlois). 



With the ascigerous perithecia are many smaller ones (spermo- 

 gonia) containing a few globose, brownish sporules 4-5 p diam. 



D. Langloisii, E. & E. Journ. Mycol. II, p. 129. 



Exsicc. EH. & Evrht. N. A. F. 2d Ser. 1786. 



Perithecia gregarious, depressed-spherical, rough, black, subasto- 

 mous, 112-120 p diam., seated on a thin mycelium of brown, branch- 

 ing threads, forming small, dark colored patches thickly scattered 

 over the upper surface of the leaf, and giving it a mottled appearance. 

 Asci subsessile, oblong, often inequilateral or bulging on one side, 

 25-30 x 7-9 p, without paraphyses. Sporidia biseriate, clavate- 

 oblong, yellowish-brown, 4-nucleate, uniseptate and slightly constricted 

 at the septum, 9-10| x 4 p. Some of the perithecia contain oblong- 

 cylindrical, 2-nucleate, subhyaline, 7-8 x2 p stylospores. The peri- 

 thecia have a radiate-cellular structure. 



On living leaves of Dianthera humilis, Louisiana (Langlois). 



D. nimbosura, E &M. Journ. Mycol. II, p. 129. 



Mycelium composed of prostrate, brown, branching, septate threads, 

 with short, erect branches bearing oblong-clavate, 3-4-septate, brown 

 conidia 35-40x6-8 p, and longer (70-80x5-6 p). erect, straight, 

 septate, opake, sterile branches, the whole forming orbicular, veluti- 

 nous, black patches J-l cm. across, mostly soon confluent, extending 

 along and enveloping the stem for 5 cm. or more. The mycelium 

 finally disappears, leaving a black, smooth, shining surface. Perithecia 

 collected mostly in the center of the spots, erumpent, conical, black, 

 carbonaceo-membranaceous, rough, about \ mm. broad and high, 

 sometimes imperfectly sulcate-striate around the prominent, mammose 

 ostiolum. Asci subcylindrical, 70-80 x 10-14 p, nearly sessile, sur- 

 rounded with abundant filiform paraphyses and containing 8 biseriate. 

 5 



