no MINNESOTA BOTANICAL STUDIES. 



Exsiccati : Seaver, Coll. of Iowa Fungi. 87 (determined by 

 Rehm). 



2. Karschia melaspiloides Rehm, Rabh. Kryptfl. 1:3: 347. 1896. 



Solitary or scattered, sessile, leathery, niinnte, i mm. across, 

 spherical, becoming saucer-like to disk-like when dry, jet-black all 

 over ; hymenium shining black ; margin entire, erect ; spores when 

 young elliptical, obtuse, hyaline, continuous, smooth, becoming el- 

 liptical-fusoid, brown, i septate, smooth, thick-walled when mature, 

 12-16x5-6 mic. ; paraphyses filiform, branching or forking at tip 

 with each apex globose, brown, forming an epithecium by clinging 

 together. 



On oak (?) bark; Dakota, July 1893, Sheldon 5319. 



3- Karschia lignyota (Fries) Sacc. Syll. Fung. 8: 779. 1889. 



PatcUaria lignyota Fries, Syst. Myc. 2: 150. 1822. 



Sparingly gregarious or scattered, sessile, hard, black, spherical 

 to disk-like ; margin incurved, distinct, to 0.75 mm. in diaiueter ; 

 spores elliptical-fusoid, smooth, brown, i septate, slightly constrict- 

 ed, thick-walled, inequilateral, some are biguttulate ; 6-12x4-5 mic; 

 paraphyses slender, clavate, brown at apex, forming an epithecium. 



On naked decaying wood ; Hennepin, Freeman. 



The smaller size of the cup and the smaller spores separate this 

 species from K. tavcUana Rehm. 



Exsiccati : Ellis, North American Fungi. 400 ; Plates : Saccardo, 

 Fungi Ital. pi. 141 1. 



4. Karschia nigerrima Sacc. Syll. Fung. 8: 780. 1889. 



Slightly gregarious, sessile, tough, disk-like, expanded, round ; 

 margin rolled in, some almost ball-like ; hymenium black, barely i 

 nmi. in diameter, minute ; spores elliptical-fusoid, smooth, brown, 

 I septate, often constricted at septa, ends somewhat acute, some are 

 biguttulate, 13-18x4-6 mic; paraphyses slender, clavate, curved, 

 brown at apex, forming an epithecium. 



On bark of Betula ; Lake, June 1893, Sheldon 4490, 4867. 



Rehm ( 178, p. 347) writes of this species that the smaller-spored 

 forms occur on Betiila and Coryhis, while the common form with 

 spores 1 5-20 x 5-6 mic. occur on Alniis. The spores of the material 

 are too large for K. lignyota Sacc. which it, however, very much 

 resembles. 



Exsiccati; Cavara, Fungi Long. 116; Plates: Saccardo; Fungi 

 Ital. pi. 108. 



