Hone: pezizales, thactdiales and tuberales of minn. 113 



b.cmispheric becomings expanded, concave, exterior scurvy ; spores 

 elliptical-fusiform, smooth, brown at maturity, 2-celled. 



I. Dermatea cerasi (Pers.) Fries, Summ. Veg. Scand. 362. no 5. 

 1849. 



Pc::iza cerasi Pers. Tent. Disp. Meth. Fung. 35. 1797. 



Solitary or in clusters 2-4, erumpent, sessile, first globose becom- 

 ing" expanded, 2-3 mm. in diameter; margin raised, distinct, wavy, 

 entire ; hymenium black, even ; exterior scurvy to mealy, brownish- 

 black ; spores cylindrical-fusiform, obtuse, thick-walled, first hyaline, 

 continuous, finally brown, one septate, smooth, straight or curved, 

 biseriate, 14-18x3-5 mic. ; paraphyses gradually clavate, yellowish- 

 brown and ends tangled. 



On dead sticks 0/ Pntnns pennsylvanica; St. Louis, July 1886. 

 Holway 157; Cook, Aug. 1903, Freeman & Ballard loi ; Hennepin, 

 May 1906, Hone 803. 



Exsiccati : Ellis and Everhart, North American Fungi. 2812 ; Ellis, 

 North American Fungi. 989 (Cenangium cerasi) ; Roumeguere, 

 Fungi selecti. 651 1; Saccardo, Myc. Ital. 673. Plates; Saccardo, 

 Fungi Ital. pi. 1309; Tulasne, Sel. Fung. Carp. tab. 19. fig. 13-17. 



5. TYMPANIS TODE. 



Cups gregarious or solitary, erumpent, minute, subsessile, black, 

 concave or plane, subcoriaceous, tough when moist ; spores minute, 

 hyaline, continuous, innumerable in the ascus. 



I. Tympanis prunastri (Fckl.) Rehm, Raben. Krypt. Fl. i: 3: 266. 1896. 



Cenangium prunastri Fckl. Symb. Myc. 267. 1869. 



Caespitose, springing from a common stroma, erumpent, sub- 

 sessile, fragile, powdery, blackish-brown, first globose, closed, be- 

 coming irregularly expanded, cylindrical, i mm. high and wide ; as- 

 cus broadly clavate, to 18 mic. wide at the apex, very narrow at base ; 

 spores innumerable, minute, hyaline, continuous ; paraphyses slender, 

 only slightly clavate and brown at apex forming an epithecium. 



On dead and fallen Prnniis branches, abundant ; Hennepin, May 

 1906, Hone 805. 



The material seems to present only the pycnidia. Dermatea Pru- 

 nastri ( Pers. ) Fries, seems to be something different although hav- 

 ing the same habitat and appearance. Rehm (178, p. 267) calls at- 

 tention to this difference. The specimens certainly agree better with 

 the genus Tympanis than with Dermatea. 



