S21 



Scattered, immersed, blackening tlie wood. Ostiola whitish. 

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

 15-18x8 n. 



On Juniperus, Darien, Ga. (Ravenel). 



E. Fraxiiii, (E. & E.) 



Thyridaria Fraxini, E. & E. Proc. Acad. Nat. Sci. PhiL July, rSgo, 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 ^hort 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, vermiiorm-cylindiical, brown, 3-6-sejftate, moderately 

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

 fainter. Sperniogonia [Cytisporina Fruxini) central. Sporules fili- 

 form, curved, 40 // long ; near Thyridaria incrxtstans, Sacc. 



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

 (Deai-ness). 



FAMILY. MELANCONIDE^. 



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

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

 stroma. Conidial stroma free or covered by the epidermis. 



The Melanconidece are separated as a iamily from the Valsece,, 

 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 uppei' surface with closely packed 

 basidia which, by consti-iction 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. 



MELANCONIS. Tul. 



Sel. Carp. II, p; 115. 



Stroma siibconical, 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 



