Lachnella ^ 271 



On bark and decorticated wood of Populus tremuloides. 



Type locality: University of Colorado Summer Camp. 



Distribution: Colorado and Montana to Oregon. 



This species resembles in general appearance Lachnella fusco- 

 sanguifiea but differs in habitat and in the longer more narrowly 

 fusoid spores. Two collections were obtained by the writer and 

 the late Ellsworth Bethel in 1910 and two collections during the 

 summer of 1929 (Seaver and Shope 107 and 140). Also one 

 specimen was received from Dr. J. R. Weir from Montana in 

 1917. All are on the same substratum Populus tremuloides. 



50. Lachnella Corni (Cash.) Seaver, comb. nov. 

 Lachnum Corni Cash, Jour. Wash. Acad. Sci. 29: 47. 1939. 



Apothecia stipitate, scattered, cup-shaped, brown, less than 

 1 mm. in diameter, the margin inrolled when dry, often becoming 

 triangular; externalh' clothed with hairs; hymenium whitish to 

 pale olive-buff; stem cylindrical .5 mm. long and 1-.7 mm. thick; 

 hairs brown, non-septate, delicately roughened; asci narrow- 

 cylindric, 8-spored, reaching a length of 33 37 n and a diameter 

 of 3-3.5 ijl; spores 2-seriate, ellipsoid, .5-1 X 4-6 /x; paraphyses 

 lanceolate, 3-3.5 /x thick. 



On leaves of Cornus Amomum. 



Type locality: Clark County, Georgia. 



Distribution: Known only from the type locality. 



Illustrations: Jour. Wash. Acad. Sci. 29: 47,/. ;. 



51. Lachnella cerina Karst. Acta Soc. Fauna Fl. Fenn. 2": 131. 

 1885. 



Peziza cerina Pers. Obs. M>c. 1: 43. 1796. 



Dasyscypha cerina Fuckel, Symb. Myc. 305. 1869. 



Helotium cerinum Karst. Myc. Fenn. 1: 156. 1877. 



Lachnea cerina Gill. Champ. Fr. Disconi. 70. 1880. 



Erinella cerina Quel. Ench. Fung. 303. 1886. 



Lachnella virginica Ellis & Ev. Proc. Acad. Sci. Phiia. 1894: 349. 1894. 



Apothecia gregarious, at first closed and subglobose, ex- 

 panding and becoming shallow cup-shaped, with a short, dark 

 stem, clothed e-xternally with brown hairs, reaching a diameter 

 of 1 mm.; hymenium becoming nearly plane, yellow; hairs 

 brown, septate, roughened on the outside, reaching a length of 

 120 tx and a diameter of 4-5 /x; asci cylindric, or subcylindric, 

 reaching a length of 40 50 yu and a diameter of 4-5 /x, 8-spored; 



