140 Field Columbian Museum- — Botany, Vol. i. 



Perithecia 4 to 8, loosely circinate. .75 mm. horn-color inside, 

 becoming nearly black, sunk in the wood, necks converging with 

 their obtuse, smooth, hemispherical ostiola erumpent in a close 

 fascicle, closely surrounded by the ruptured epidermis. Asci 

 slender, 55 to 60 x 6 to 7 //, short-stipitate. Sporidia subbi- 

 seriate, fusoid-oblong, hyaline, 2 to 4-nucleate, becoming uni- 

 septate and slightly constricted, straight, 12 to 15 x 2.5 to 3 /a. 



There is no distinct circumscribing line around the stroma, 

 but the inner surface of the bark is uniformly blackened. 



D. Chorostate Tetrapterse E.& E., Proc. Phila. Acad., 339 (1894). 



Type habitat: On dead limbs Mohrodendron Carolinuvi, May, 

 1894 [Nutiall, discov. 1542). 



Stroma cortical, 1.5 to 2 mm. diameter, surrounded by a black 

 line which does not penetrate the wood. Perithecia 4 to 12, cir- 

 cinate, 5 mm. diameter, sunk to the wood and leaving their im- 

 press on its surface but not penetrating it. Ostiola obtusely 

 rounded and perforated, erumpent in a compact fascicle and 

 closely surrounded by the ruptured epidermis. Asci clavate- 

 cylindrical, 75 to 80 x 12 //. Sporidia biseriate, oblong-fusoid, 

 slightly curved, subobtuse, hyaline, uniseptate and constricted 

 at the septum, each cell with a large nucleus, 9 to 22 x 5 to 7 ,«. 



Differs from D. Halesiff E. & E., in its smaller perithecia, not 

 sunk in the wood, and its much larger sporidia. 



D. Chorostate Aceris Fckl. 



On Acer saccharinum, L., Jan. 26, 1894 i^Nuitall, 1739). 



D. Hydrangeae E. & E., sp. nov. 



Type habitat: On dead stems Hydrangea arboresceus, Nov. 

 1894 {Nut tall, discov. 1756, 641). 



Perithecia scattered, ovate-globose, 350 to 380 ,« diameter, 

 sunk in the wood, which is not at all discolored. Ostiola 

 stout, erumpent, short-cylindrical, or conic-cylindrical, the apex 

 papilliform. Asci (p. sp.) oblong-cylindrical, 50 to 60 x 8 //, 

 8-spored, obscurely paraphysate. Sporidia biseriate, oblong 

 elliptical, hyaline, uniseptate, slightly constricted, 12 to 15 x 

 3 to 4 :j., ends subacute. 



This may be the Sphceria spoken of by Schweinitz as found by 

 him on limbs of Hydrangea, in company with his Spharia {Teich 

 ospora) HydrangecE. 



D. Chorostate cercophora (Ellis.) Sacc. 



On Ilex opaca Dec. 23, 1893, March 15, 1894 {Nitttall, 1333). 



D. Chorost.\te oncostoma (DuB.) Fckl. 



On Rohinia Pseudacacia, April 7, 1894. Spores 17 to 19 x 4 to 

 5 !>. {Nut tall, 1446). 



D. Chorostate sociata (C. & E.) Sacc. 



On Benzoin Benzoin, April 13, 1895. Helminthospores 75 to 100 

 x 15 I).. 7-septate {Nuttall, 1798). 



D. Chorostate obscura (Peck) Sacc. 



On Rubus villosus, Feb. 13, 1893 {Nuttall, 131 3, 260). 



