1014] 



BURT — THELEPHORACEiE OF NORTH AMERICA. Ill 367 



ican specimens distributed in Ravenel's 'Fungi Americani/ 

 458, were determined by Cooke. In their present dried condi- 

 tion these specimens agree well with Holmskiold's illustrations 

 in form; the stem of these specimens is now hair-brown and the 

 pileus pale olive-buff; their dimensions are: fructifications 1-3 

 mm. long, pileus §-2 mm. long and broad; stem ^-1 mm. long 

 X 100 IX thick. The basidia are 16-20 x 3|-4| )u; spores color- 

 less, even, flattened on one side, 4^-6 x 3-3 1 n. 



Specimens examined: 

 Exsiccati: Ravenel, Fung. Am., 458. 

 South Carolina: Aiken, Ravenel, Ravenel, Fung. Am., 458. 



10. C. minutissima Burt, n. sp. Plate 19. fig. 5. 



Type: in Mo. Bot. Gard. Herb, and in Farlow Herb. 



Fructifications gregarious, very minute, membranaceous and 

 very delicate, sessile, globose, snow-white, externally villose, 

 often with mouth oblique, margin inrolled; hairs white, in- 

 crusted, 75-90x4 ii] hymenium concave, white; basidia cla- 

 vate, 16 X 4 y.) spores colorless, even, 5-6 x 4-4|/x. 



Fructifications 200-500 ^ broad, about 200-500 n high. 



On inner bark of Populus. New Hampshire.- August. 



The characters of this species agree in some details with those 

 in the incomplete description of C. globosa Pat., the specimens 

 of which were collected on the under side of leaves of ferns in 

 Ecuador by von Lagerheim, but as no mention is made of spore 

 characters for C. globosa and as other species of Cyphella have 

 not been found to vary widely with regard to kind of substra- 

 tum, it seems best to regard our New England species as proba- 

 bly distinct. C. punctiformis (Fries) Karst. is a small white 

 Cyphella, described by Karsten as having spores 5-8 x 2-4 n ; 

 I have not been able to study authentic specimens of C punc- 

 tiformis, but comparison of C. minutissima with this species of 

 northern Europe should be made. 



I refer to C. minutissima a collection made by myself in Ver- 

 mont on bark of rotting locust limbs. The fructifications of this 

 collection lack spores but agree in all other respects with the 

 type. 



Specimens examined: 

 New Hampshire: Chocorua, W. G. Farlow, 3, type (in Mo. 



Bot. Gard. Herb., 43803, and in Farlow Herb.). 

 Vermont: Middlebury, E. A. Burt. 



