1883. | Botany. 195 
Melanconis ( Melanconiella) Decoraensis—Perithecias ubglobose, 
coriaceous, %™" diam. 8—12 circinating in a cortical stroma cov- 
ered by the thick epidermis; ostiola scarcely prominent, united 
in an elliptical, erumpent, dirty gray disk ; asci cylindrical, briefly 
stipitate, spore-bearing part 95-115 X 8-11,; sporidia uniseriate, 
elliptical, and obtuse olivaceous, uniseptate,1 5-20 x 8-104. The 
accompanying Melanconium mostly in a separate stroma with 
abundant pip-shaped olive black spores of about the same size as 
the ascospores On dead limbs of birch. Decorah. Iowa, Aug., 
1882. 
Cryptosporella lentaginis Rehm (in literis.)}—Perithecia globose, 
¥%™ diam. membranaceous, mostly 3-4 together in a cortical 
stroma, their bases sunk into the subjacent wood ; ostiola short, 
barely piercing the epidermis, which is raised into numerous little 
tuberculiform pustules ; asci clavate-cylindrical, 45 x 7-8; spo- 
ridia biseriate, cylindrical, hyaline, straight or slightly curved, 11- 
12 X 2-2%y, with 2 or 3 minute nuclei. The substance of the 
bark is blackened by the mycelium. On dead Viburnum lentago. 
! Decorah, Iowa, June, 1882. E. W. Holway, No. Ir, partly. 
h. _ Diatrype tiliacea.—?Perithecia subelongated (14 x %™) buried 
in the scarcely altered substance of the inner bark, in clusters of 
5-10 or more, their rough, conic or cylindric-conic ostiola burst- 
: ing through the epidermis in compact clusters, but scarcely united 
in a disk; asci. broad, oblong, 80-90 x 18-22n; paraphyses? 
i Sporidia in 2 or 3 series or lying obliquely, 8 in an ascus, 
obiong-cylindrical, slightly curved, obtuse, hyaline, becoming 
uniseptate, slightly constricted in the middle with a single large _ 
nucleus in each cell, 22-30 x 7-8». The clusters of perithecia 
often longitudinally confluent, are surrounded by a faint circum- 
scribing line visible only near the surface. The ostiola (14-1"" 
long), are at length ruptured at their tips with a broad, irregular 
opening. The ascigerous nucleus is white. On bark of dead 
Tilia americana. Ames, Iowa, Oct. 1882. J. C. Arthur, No. 86, 
Diatrype phaeosperma.—Stroma small (1™™ diam.) tuberculiform, 
osely embraced by the imperfectly laciniate-cleft epidermis ; 
a cia 6-8, %4™" diam. with thick coriaceous walls, lying in a 
Single layer under the white stroma, which is circumscribed by a 
black line that scarcely penetrates to the wood beneath; asci 
‘Spore bearing part) about 55 x 7»; sporidia imperfectly biseri- 
ate, cylindrical, curved, continuous, brown, 10-12 X 3-3 4p, ends 
ee iola obtuse, black, not prominent, dotting the pale 
1 Or wood-colored disk. On dead limbs. Decorah, lowa, 
ey . 1882. E. W. Holway, No. 228. Tee 
Shot ybe radiata —Perithecia membranaceous, 8-15, bedded in 
2 light-colored tuberculiform stroma, which splits the epidermis 
ee ‘ciniate manner, and is circumscribed by a black line, which 
96S not, however, penetrate to the wood; ostiola obtuse, scarcely 
= + minent; asci clavate, 75-80 x 6; sporidia cylindrical, yel- 
