238 
punctate from the minute ostiola which are hardly visible when mature. 
The bark and wood beneath the stromata are marked with a black circum- 
scribing line. Perithecia arranged in a single row, oval or ovate-cylindrical, 
about one millimeter long, usually rather abruptly contracted above into a 
short neck and extending to the base of the stroma. <Asci cylindrical, 140- 
170x10-15 microns (E. & E., 110-120x10-12) ; spore bearing part, 110-125x 
10-15 microns. Paraphyses, long and filiform. Sporidia subglobose, almost 
hyaline at first, finally becoming opaque, 10-16 microns in diameter. (11-15 
Gloyer. 10-12 E. & E.) 
On dead trunks and branches of Pyrus malus; quite common on the 
living trees as well. Practically every orchard visited in Hendricks, Put- 
nam and Monroe counties, Indiana, as well as Delaware County, Ohio, 
showed traces of this fungus. Gloyer reports it especially abundant in 
southern Ohio. Reported on Amelanchier canadensis, Newfield, N. J., and 
on Gleditschia triacanthos, Ohio, (Morgan); also (See Saccardo in Svyll.) 
on Sorbus, Ulmus, Cercis and Magnolia. 
On apple trees this fungus usually attacks the trunks and larger 
limbs, making somewhat sunken, cankerous areas several inches in length. 
The dead bark is separated from the sound by a distinct line and cracks 
occur along this boundary. At the beginning, living spots within the cank- 
erous area give the affected parts a mottled appearance. This distinguishes 
it at this stage from other cankers. 
2. Nummularia repanda, (¥r.) Nke. 
Sphaeria reprnda, Fr. S. M. IL, p. 346, Obs. Mycol. I, p. 168. 
Hypoxylon repandum, Fr. Summa Veg. Se. p. 385. 
Numimularia pezizoides, If. & 1. Bull. Torr. Club, XI, p. 74. 
Nummularia repanda, Nitsch. Pyr. Germ. p. 57. 
Pxsic. Fckl. F. Rh. 2178. Thum. M. U. 1460. 
Stroma erumpelt-superficial, orbicular or subelliptical, 4 to 1 em. in di- 
ameter, concave and often with a thin, erect, rather broad margin, reddish- 
gray at first, finally black; disk mammillose from the projecting ostiola. 
Perithcia monostichous, immersed, ovate-oblong, 4 to } mm. long, crowded, 
causing the sides to be somewhat compressed. <Asci cylindrical, subsessile, 
eight-spored, 110-120x8 microns, with long filiform paraphyses. Sporidia 
obliquely uniseriate, narrow ovate, obtuse, subinequilateral, dark brown, 
84-14x4-74 microns. (E. & FB. 11-14x4-5 microns; Sace. in Syll., 15-16x6-7 
microns.) Readily distinguished from N. discreta by its differently shaped 
spores and its mammillose disk. 
