521 



Scattered, immersed, blackening the wood. Ostiola whitish. 

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

 15-18x8//. 



On Jimiperus, Darien, Ga. (Ravenel). 



E. Fraxini, (E. & E.) 



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



Perithecia thickly scattered, buried in and almost filling the bark 

 which is uniformly blackened on the inner surface but otherwise un- 

 changed; globose, \-\ mm. diam., coriaceous with thick walls, black 

 and shining inside, contracted above into a short neck terminated by 

 an erumpent, subhemispheric-tuberculiform, black ostiolum more or 

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

 90-100x15-20//, 8-spored.* Paraphyses obscure. Sporidia con- 

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

 curved, 20-26 x 4 //. The central .septum is distinct, the others 

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

 form, curved, 40 jul long ; near Thyridaria incrnstans, Sacc. 



On dead limbs of Fraxinus (and on maple)? London, Canada 

 (Dearness). 



FAMILY. MELANCONIDEiE. 



Stroma valsoid, pulvinate, conical or hemispherical, often incon- 

 spicuous or wanting. Perithecia buried more or less deeply in the 

 stroma. Conidial stroma free or covered by the epidermis. 



The Melanconidew are separated as a family from the Vaheie. 

 only by the accompanying conidia which are produced in a stroma not 

 unlike the ascigerous stroma, generally covered at first by the epider- 

 mis, and thickly studded on its upper surface 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 .stroma or in a separate stroma. 



MELANC0NIS, Tul. 



Sel. Carp. II, p. 115. 



Stroma subcorneal, pulvinate or hemispherical, small, buried, with 

 only the apex erumpent, 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 8-spored. 



66 



