726 



ceous, opening at the apex with a nearly round or subelongated, 

 rather large opening, finally deciduous. Asci clavate-cylindrical, short- 

 stipitate, paraphysate, 8-spored, 80-90 x 20 fi. Sporidia biseriate, cla- 

 vate-oblong, yellowish-hyaline, uniseptate, becoming 3-septate (pseudo- 

 septate), slightly constricted at the middle septum, 20-24 x 7-8 /i. 



On living branches of Quercus alba, Q. coccinea, &c., common. 



The diagnosis is from the specimens distributed in N. A. F. The 

 asci and sporidia differ considerably from Dr. Rehm's figure in Die 

 Pilze; the former, especially, being longer and narrower. The spo- 

 ridia remain a long time with only one septum. 



1). faginea, (Pers.) 



Opegrapha faginea, Pers. in Anna!. Bot. VII, p. 32. 

 Hystcrium fagineum, Rab. Pilze, p. 155. 

 Schizoderma fagineum, Chev. Flor. Par. p. 438. 

 Opegrapha epiphega, Ach. Meth. Lich. p. 24. 

 Hysteriuni rugosum, Fr. Summa Vegf. Scand. p. 402, 

 Dichczna rugosa, Rab. Pilze, p. 472. 

 DichcEna faginea, Fr. Elench. II, p. 141. 

 Exsicc. Fckl. F. Rh. 1569. — Rab. Herb. Mycol, 450. — Rav. Car. II, 66. — Rav. F. Am. 335. 

 Sydow, M. March. 486.— EU. & Evrht. N. A. F, 2d ser. 2067. 



Perithecia as in D. qvercina, but more elongated and hysterii- 

 form, opening a.bove by a more distinctly elongated cleft, erumpent, 

 as in that species, on sharply defined, black, crustaceous spots which 

 are usually transversely elongated, 5-6 x 1 cm., or often longer. The 

 inner sui-face of the perithecia is lined with stout basidia 15-25.// long, 

 bearing at their tips elliptical, hyaline sporiiles 12-15x7-8 //, with 

 granular contents. 



Common on trunks of living beech trees. 



D. strumosa, Fr. Nov. Symb. p. 132. 



Exsicc. Rav. Fungi Car. II, 67. 



Perithecia about as in D. faginea, crowded on orbicular, raised 

 spots about 1 cm. diam. The hymenial cavity is lined with stout 

 sporophores 15-25 [i long, bearing, as in the preceding species, ter- 

 minal, elliptical, hyaline sporules 20-25x12-15 fi, with granular 

 contents. 



Common on limbs and trunks of living Quercus coccinea and 

 Q. nigra, Carolina (Ravenel), Mexico (Liebman), New Jersey (Ellis). 



This species is vei-v common around Newfield, N. J., on Quercus 

 coccinea, and very injurious, finally killing the trees on which it grows. 

 The round, black spots on which the perithecia are seated are at first 

 only slightly raised above the bark, but each succeeding year they 

 increase in circumference and rise higher, soon forming globose, knob- 

 like swellings, at first bulging out on one side of the limb, but finally 



