545 



slightly discolored surface of the inner bark and covered by the epi- 

 dermis. Perithecia 4-6, closely packed and mostly surrounded by a 

 thin, dark-colored stroma, rather large, nearly \ mm. diam., attenuated 

 above into short, cylindrical necks with ostiola convergent and per- 

 forated, piercing the epidermis, but not rising above it. Asci cylin- 

 drical, 180-250x18-20 p (180x18 p, Sacc), short-stipitate, with 

 filiform paraphyses; 6-8-spored. Sporidia uniseriate, oblong-elliptical, 

 35-45 x 16-18 //, hyaline at first, becoming opake and almost black, 

 9-11-septate, with a few of the cells at first divided by longitudinal 

 septa, finally densely nmriform. 



On decaying branches of Quercus alba, Newfield, N. J. 



When the epidermis is peeled off, the clusters of perithecia remain 

 attached to the surface of the inner bark. The sporidia are scarcely 

 constricted at the septa. 



F. Canadensis, E. & E. (in Herb.) 



Stroma cortical, covered by the epidermis, orbicular, 1-3 mm. 

 diam., sunk in the surface of the inner bark which is only slightly 

 raised above it Perithecia 3-10 in a stroma, of medium size, circinate, 

 buried in the stroma, their short-cylindrical, rounded and obtuse, per- 

 forated ostiola slightly raising and piercing the epidermis in a com- 

 pact fascicle, but hardly rising above it. Asci cylindrical, p. sp. 

 100-115 x 15 //, briefly stipitate, 8-spored. Paraphyses filiform, suit- 

 gelatinous, guttulate, indistinct. Sporidia uniseriate in some asci, 

 biseriate in others, acutely-elliptical, 3-septate, the two inner cells 

 mostly divided by a longitudinal septum, hyaline at first, becoming 

 olivaceous-brown, except the subapiculate end cells which remain 

 hyaline, 22-30 x 10-12 p. 



On bark of dead Carpinus, London, Canada (Dearness). 



The conidial stage is a Coryneum (issued in N. A. F. 2578 as 

 C. umbo?iatu?n, Nees.) with subfusoid, 6-9-septate cohidia curved at 

 the ends, 40-60 x 8-10 a, borne on simple, stout basidia 10-1 5 x 4-5 p. 

 The Coryneum grows under the epidermis which is finally perforated 

 and slightly raised, and afterwards the circle of perithecia send up 

 their ostiola through the same opening. 



P. hormospora. Cke. Grew XIV, p. 48. 



Valsa conjuncta, Schw. (not Fries) Syn. N. Am. I383. 

 Valsa hormospora, B. & C. in Herb. 



Perithecia few, crowded in irregular circles, disk erumpent, 

 whitish, pulverulent. Ostiola short, subconnate. Asci ample, clavate. 

 Sporidia subelliptical, not append iculate, constricted in the middle. 

 5-septate, at length merenchymatic, brown. Disk orbicular. 



On branches, Bethlehem, Pa. No measurements gii 

 69 



