437 



Perithecia immersed in pustules formed of the scarcely altered 

 substance of the inner bark, 4-12 together, globose, black, 200 ju or 

 over diam., contracted above into slender necks with the ostiola 

 barely piercing the pustulate-raised epidermis. The pustules are often 

 thickly scattered and subconfluent. Asci about 50 x 7 /*, clavate, 

 aparaphysate. Sporidia biseriate, fusoid, 4-nucleate, then uniseptate, 

 scarcely constricted, straight or slightly curved, 1 6-20 x 2|-3 ju, attenu- 

 ate-acuminate at each end. 



On Comptonia asplenifolia, Pennsylvania and New Jersey. 



On old dead stems of Comptonia, the cracks in the outer bark 

 often extend entirely around the stem, and in these cracks the necks 

 of the perithecia, which were at first enclosed in the bark, are exposed, 

 projecting in fascicles, or often in a continuous series half way round 

 the stem, but their tips scarcely rise above the surface of the bark. 

 The specc. of S. Comptonice, Schw., in Herb. Schw., do not afford 

 any fruit, so that we cannot certainly say that what we have here 

 described as D. Comptonim, (Schw.), is really what he designated 

 under that name. The outward appearance, however, of the specc. in 

 the Schweinitzian collection is the same as that of the specc. we have 

 referred to that species. 



D. phomaspora, (C. & E.) 



Valsa phomaspora, C. & E. Grev. VI, p. 10. 

 Valsa {Cry ptosporella) phomaspora, Cke. Syn. 1938. 

 Exsicc. EH. N. A. F. 179. 



Pustules covered by the slightly raised epidermis, scattered, small, 

 about 1 mm. diam. Perithecia 4-8 in a stroma, minute (150 /i), sub- 

 circinate in a cortical stroma which is a little paler than the surround- 

 ing portions of the bark, ovate-conical, necks short, converging, with 

 the fascicle of minute ostiola barely visible through short, transverse 

 cracks in the thick epidermis. Asci oblong-clavate, rounded above at 

 first, then fusoid, 40 x 6-7 //, sessile, 8-spored, aparaphysate. Sporidia 

 biseriate, fusoid-elliptical, 4-nucleate, becoming uniseptate, hyaline, 

 8-10x2i-3i ft. 



On dead stems of My rica cerifera, Newfield, N. J. 



D. Ontariensis, E. & E. (in Herb.) 



Perithecia 2-6 together, about \ mm. diam., in a depressed-hemi- 

 spherical, cortical stroma with a black outer stratum penetrating the 

 wood. Ostiola at first conical, then umbilicate, thick and stout, erum- 

 pent in a black, carbonaceous disk which raises the epidermis into 

 distinct pustules. Asci lanceolate, p. sp. about 65x12 /i. Sporidia 

 biseriate, elliptical, uniseptate and constricted, obtuse, hyaline, 12-15 x 

 -6|>. 



