

Perithecia circinate, fe\v. nestling in the unaltered substance of 

 the bark and raising the epidermis into little pustules, small 050 p.], 

 aitout four together, contracted above into slender necks terminating 

 in the short, inconspicuous ostiola. which barely rupture the epidermis 

 without projecting above it. ' Asci oblong 25-30x5-0 a. Sporidia 

 biseriate, oblong-sublanceolate, slightly curved. 2-4-nucleate. unisep- 

 tate. hyaline, 6-7 x 1 J-2 /JL (18 xo a, Cke.). 



On dead limbs of j\Iyrica, Darien. Georgia (Ravenel). 



This discrepancy between Cooke's measurements and ours i? 

 remarkable. We have carefully examined the spec*: 1 , in Rav. F. Am. 

 and find the sporidia as stated above. 



I). Woohvorthii, (Pk.) 



Valsa Wooht-'ovtliii, Pk. 2*th Rep. p. 73. 

 Diafxnthc H'ooli^nthii, Sacc. Syll. 2 



Minute, erumpent. Perithecia 2-6 together, nestling in the innei 

 !>ark. Ostiola stout, becoming umbilicate, crowded, slightly prominent. 

 liardy rxserted through the ruptured epidermis. Asci p. sp. 30-35 x 

 1 IJL. Sporidia crowded or biseriate, oblong-fusoid, umseptate, scarcely 

 onstricted, nearly colorless. 10-12x2J-3| p. 



On dead oak and hickory branches, Greenbush, N. Y. (Peck), on 

 oak and Til HI. Canada ( J>ejirne- 



The clusters of perithecia are very numerous and often seriate. 

 the epidermis being ruptured from one to another. What appears to 

 lie the same has been sent by Mr. Langlois from Louisiana, on dead 

 limbs of white oak. with the ostiola at first erumpent through a pale 

 disk which at length disappear-. 



I), farinosa, Pk. 40th Rep. p. 69. 



Stroma subpulverulent or mealy, dull buff color, formed of the 

 slightly changed inner bark, erumpent in a minute, slightly exserted 

 disk. Perithecia irregularly circinating, generally 4-10 together, the 

 clusters subconfluent. Ostiola black, dotting the prominent, pulveru- 

 lent. buff-colored or, at length, brownish disk. Asci subcylindricab 

 55-75 x 7|-10 IJL. Sporidia crowded or biseriate, oblong or subfusi- 

 f'orm. umseptate, generally 4-nucleate, 15-20 x 3J-4 //. 



On dead branches of Tilia Americana. Argusville, X. Y. (Peck;, 



This species approaches D. furfuracea in its pulverulent stroma, 

 but differs in its prominent disk, making the branches rough to the 

 touch, and in its smaller sporidia. From I). velata it is easily sepa- 

 rated by the entire absence of any black, circumscribing line or black- 

 ened surface. It evidently belongs to the submenus Chorostate. but 



< 



the clusters of perithecia are so numerous that they form an almost 



