569 



On dead limbs of Mag^ioUa and of {Nyssaf. South Carolina 

 (Ravenel). 



The diagnosis here given is drawn from the specc. in Rav. F. Am. 

 The species seems to differ from D. disciformis principally in its 

 smaller stroma and more prominent ostiola, but is hardly more than a 

 variety of that species. 



D, disciformis, (Hoff.) 



Spheeria disciformis, Hoff. Veg. Crypt. I, p. 15, tab. IV, fig. 1. 

 Sphtzria depressa, Sow. ISng. Fung. II, tab. 216. 

 Sphizria grisea, DC. Flore Fr. II, p. 122. 

 Diatrype disciformis, Fr. Summa, 385. 

 Exsicc. Fckl. F. Rh. 1041, 2545, 2546.— Rab. F. E. 137.— Rehm Asc. 521.— Lin. Fung. 

 Hung. 179.— Cke. F. Brit. 2d Ser. 218.— Krieger F. Sax. 86. 



Stromata scattered or gregarious, flattened-pulvinate, round, 2-3 

 mm. diam., discoid, erumpent and loosely embraced by the ruptured 

 epidermis, dark brown, whitish inside, base sunk to the wood and cir- 

 cumscribed by a black line. Perithecia 20-30 (or more) in a stroma, 

 ovate, about | x J mm., closely packed and subangular, with short 

 necks and small, obtusely conical, smooth or 3-5-cleft, slightly pro- 

 jecting ostiola. Asci clavate, long-stipitate, p. sp. 22-30x4^5 (x. 

 Sporidia subbiseriate, allantoid, yellowish, slightly curved, 6-8 x 

 U-2 /.. 



On dead limbs oi Fagus, also on other deciduous trees. 



Schweinitz, in his Syn. Car., speaks of this as very common ("vul- 

 gatissima"). Berkeley also, in Grev. IV, p. 95, quotes it from North 

 Carolina, Alabama and Pennsylvania under eight different numbers, 

 but we have never seen any American specimens agreeing well with 

 the European, of which the description is given above. 



D, virescens, (Schw.) (Plate 34) 



Spharia virescens, Schw. Syn, N. Am. 1239. 

 Diairype disciformis, var. virescens. Berk. Grev. IV, p. 95. 

 Exsicc. EH. N. A, F. 776.— Rav. F. Car. IV, 48. 



Stromata scattered, erumpent-superficial, orbicular', about 2 mu.. 

 diam., depressed-pulvinate, surrounded at l)ase by the ruptured epi- 

 dermis, disk greenish-yellow pulverulent, becoming darker with age. 

 Perithecia monostichous, covered by the waxy, whitish substance of 

 the stroma, about | mm. diam., 10-15 in a stroma, necks terminating in 

 obtusely conical, 4-cleft, black ostiola barely erumpent through the 

 greenish disk. Asci p. sp. about 35 x 5 //, stipitate, 8-spored. Spo- 

 ridia subbiseriate, allantoid, )'ellowish, moderately curved, 7-9 .\ 



lJ-2 11. 



On dead limbs of Fagus, common where that tre6 is found. 



72 



