678 



7-8 //, obscurely paraphysate, 8-spored (6-10-spored, Desm.). Sporidia 

 subbiseriate, obovate, hyaline, uniseptate and slightly constricted at 

 the septum, 6-7 x 2| ji. 



On very old, dry, dead leaves of Pimis rigida, Newfield, N. J. 



The measurements of asci and sporidia are from the spec; in 

 Desm. 1. c. 



A. quercinum, Ell. & Martin, in Am. Nat. Dec. 1883, p. 1283. 



Kxsicc. EH. & Evrht. N. A. F. 2d Ser. 2066. 



Perithecia epiphyllous, scattered or oftener collected in orbicular 

 patches, oblong or linear, often branched, opening by a longitudinal 

 fissure along the center, mostly less than 1 mm. long, straight or 

 curved, bordered with a fringe of mycelium at the base. Asci ovate, 

 20-25 x 15-18 jjl, 8-spored. Sporidia conglobate, obovate, uniseptate, 

 hyaline, 10-14 x 6-7 jjl (including the hyaline envelope). 



On leaves of Quercus virens, Florida (Martin & Calkins), Louisi- 

 ana (Langlois). 



A. gracile, Ell. & Martin, (in Herb.) 



Perithecia epiphyllous, on orbicular, dark brown spots 3-4 mm. 

 diam., linear, straight or curved, often branched, about 1 mm. long and 

 60-70 /a wide, opening by a longitudinal fissure along the center. 

 Asci ovate, 20-25x10-12 //, 8-spored. Sporidia conglobate, ovate, 

 hyaline, uniseptate, 7-8x3-3| ju, including the hyaline envelope. 



On leaves of Quercus aquatica, Houston, Texas (Ravenel). 



Possibly this should be considered a var. of A. quercinum, 

 E. & M., but it differs in its longer, more slender perithecia on brown 

 spots, and its smaller sporidia. 



A. Arundinarise, Cke. Grev. XIV, p. 14. 



Perithecia erumpent, at length superficial, gregarious, linear, 

 straight, generally longitudinally confluent, 1-2 mm. long; lips closed, 

 black, subshining. Asci pyrifbrm, 8-spored. Sporidia subelliptical, 

 attenuated below, uniseptate, not constricted, hyaline, 13-15 x 5 jjl. 



On culms of Arundinaria, Darien, Ga. (Ravenel). 



A. reticulatum, Phil. & Hark. 1. c. p. 23. 



Exsicc. EH. & Evrht. N. A. F. 2d Ser. 2065. 



Perithecia suborbicular, convex, 300-350 ji diam., adnate-super- 

 ficial, scattered, thin, formed of reticulately interwoven hyphas; lips 

 thin, at first closely connivent, forming a narrow ridge extending only 



