521 



Scattered, immersed, blackening the wood. Ostiola whitish. 

 Asci cylindrical. Sporidia tmiseriate, elliptical, triseptate. brown. 

 15-18x 8 fji. 



On J'uufpcms, Darien, Ga. (Eavenel). 



E. Fraxini, (E. & E.) 



Thyridaria Fraxini, E. & E. Proc. Acad. Nat. Sci. Phil. July, 1890, p. 223. 



Peritheeia thickly scattered, buried in and almost filling- the bark 



. _ 



which is uniformly 1 thickened on the inner surface but otherwise un- 

 changed; globose. |-| nun. cliam., coriaceous with thick walls, black 

 and shining inside, contracted above into a ^iort neck terminated by 

 an eruinpent, subhemispheric-tuberculiform, black ostioluni more or 

 less distinctly radiate-sulcate. Asci clavate, with a slender base. 



%/ 



IM i-lOO x 15-20 IJL. 8-spored.* Paraphyses obscure. Sporidia con- 

 glomerate, vermiform-cylindrical, brown. 3-6-septate, moderately 

 curved, 20-26x4 //. The central septum is distinct, the others 

 fainter. Spermogonia (Cytisporina Fraxini) central. Sporules fili- 

 ibrm. curved, 40 IJL long; near Thyridaria i-ncmstaus, Sacc. 



On dead linilis of Fr<i,''/ji>ix (and on maple)? London, Canada 

 (Dearness). 



FAMILY. MELANCONIDEJ1, 



Stroma valsoid. pulvinate, conical 01- hemispherical, often incon- 

 spicuous or wanting. Pn-ithoc-ia buried more or less deeply in the 

 <troma. Conidial stronia free or covered by the epidermis. 



The Melanconidece are s-j arated as a iamily from the Vatst-a-. 

 only by the accompanying conic: ia which are produced in a stronia not 

 unlike the ascigerous strun.a. generally covered at first by the epider- 

 mis, and thickly studded on its upper suriace with closely packed 

 basidia which, by constriction of the terminal cell, produce and throw 

 off an abundance of conidia, which soon rupture the overlying epider- 

 mis and escape. The perithecia are developed after the conidia, and 

 are either produced in the same stronia or in a separate stronia, 



MELANCOMS, TuL 



Sel. Carp. II, p. 115. 



Stronia subconical, pulvinate or hemispherical, small, buried, with 

 only the apex eruinpent, often imperfectly developed. Perithecia 

 buried, mostly globose, with long, cylindrical necks. Asci 8-spored 

 typically paraphysate. Sporidia uniseptate. hyaline or colored. 



;:: In the original diagnosis the asci were inadvertently said to be polysporous. They are 

 only S-spored. 



66 



