148 
Ascochyta silenes, n. s. On leaves and stems of Silene antir- 
rhina , Racine, Wis. June 1888, Dr. J. J. Davis, 23, and on the same 
host collected by Mr. F. W. Anderson (No. 350) in Montana. Spots 
pale yellowish, the entire leaf finally assuming the same color, the spots 
which are then hardly discernible becoming paler. Perithecia erum- 
pent discoid, 120-150/t in diameter, broadly pierced above, not confined 
to the spots but scattered over the entire leaf. Sporules oblong, hya¬ 
line, 2-3 nucleate, rounded at the ends 10-14 by 2J-3//. In the Wis¬ 
consin specimens Sep tor ia saponarice , (D C.) occurs also on the same 
leaves,but may be distinguished with the naked eye by its paler perithe¬ 
cia. This differs from Phyllosticta nebulosa, Sacc., in its larger scattered 
perithecia and larger sporules. The specimens of P. nebulosa in Sac- 
cardo’s Mycotheca Yeneta (in our copy) are a Sphcerella with clavate- 
oblong, inequilateral 35 by 15/4 asci and crowded, oblong-fusoid 1-sep- 
tate 12-15 by 3-3J/4 sporidia. 
Ascochyta? infuscans, n. s. On leaves of Ranunculus (abortivus f), 
London, Canada, July 18,1889 ; J. Dearness, 256. On large, dark brown, 
indefinitely limited areas of the leaf, causing faintly zonate indefinite 
spots, in which are buried the brown perithecia, slightly raising the sur¬ 
face of the leaf in a pustuliform manner. Sporules oblong, hyaline, 
obtuse, narrowed in the middle, with two large nuclei 10-15 by 4-6/4 
(becoming uniseptate ?). 
Ascochyta thaspit, n. s. On leaves of Thaspium barb-inode , London, 
Canada, August, 18S9; J. Dearness, 511. Spots amphigenous, subor- 
bicular, dirty brown, with definite margin, surrounded by a narrow 
yellow border, about 1£ centimeters in diameter. Perithecia innate, 
pale, 100-120//in diameter, entirely buried in the substance of the leaf 
and scarcely visible. Sporules cylindrical 1-septate (3-4 nucleate), 
25-30 by 6-8/4, ends rounded and obtuse. 
Ascochyta alismatis, n. s. On leaves of Alisma plantago, London, 
Canada, August, 1889; J. Dearness, 512. Spots amphigenous, round, 
small (1-2 millimeters), dirty brown, whitish in the center, surrounded 
by a faint yellowish discoloration. Perithecia innate, pale, 80-100//, 
with a broad opening above. Sporules oblong cylindrical, 12-16 by 
2£-3/4, 2-nucleate becoming 1-septate. 
Ascochyta cornicola, Sacc. This seems to be quite variable in 
the size of the sporules. Saccardo says 7-10 by 3J-4//. Specimens on 
leaves of Gornus sericea sent from Wisconsin by Dr. J. J. Davis have 
sporules 7-11 by 5-6//. Specimens from Ohio sent by Professor Mor¬ 
gan have sporules 10-15 by 3£-4//. Phyllosticta cornicola does not 
differ in any respect, except that the sporules are not septate, and is 
probably a less perfectly developed state of Ascochyta cornicola. 
Asteroma ribicolum, n. s. On living leaves of Ribes floribundum , 
Helena, Mont., August, 1888; Rev. F. D. Kelsey, No. 210. Epiphyl- 
lous. Fibrils branching and radiating from a central point, forming 
