1926] 



BURT THELEPHORACEAE OF NORTH AMERICA. XV 317 



Phaeocyphella muscicola (Ft.) Rea, Brit. Basid., 704. 1922; 

 Pilat, Monogr. Cyphellacearum Czechoslov. 2: 67. text f. 16. 

 1925. 



Fructifications gregarious, sessile or subsessile, cup-shaped, 

 thin, membranaceous, the margin slightly downy, at length 

 somewhat flaring; hymenium concave, even, snuff-brown with the 

 copious spores; spores colored, even, spherical, 6-6^2 u- in di- 

 ameter, so copious that they conceal the basidia. 



Fructifications up to 1 mm. in diameter in American specimens, 

 equalling the diameter in height. 



On mosses. West Indies. November. 



I have seen no European specimens of this species but the single 

 gathering from Grenada agrees well with the concept of the 

 species as more definitely described by the recent European 

 mycologists. The occurrence on mosses, ashy white, open cups 

 which become slightly flaring at the margin, and brown hy- 

 menium and spores are distinctive characters. 



Specimens examined : 

 Grenada : R. Thaxter, comm. by W. G. Farlow, 5. 



C. patens A. L. Smith, Linn. Soc. Bot. Jour. 35: 10. pi. l,f. 6-8. 

 I?ti 1891; Sacc. Syll. Fung. 17: 192. 1905. 



Type: in Brit. Mus. Herb, presumably. 



"Sparsa, tubaeformis, dein elongata, fere ad basim fissa et ex- 

 pansa, margine superiore incurvata, circa 5 mm. longa, 2 mm. 

 lata, extus flava tomentosa; hymenio brunneo, lamellis paucis 

 angustis lamelliformis instructis; sporis globosis, minute asperulis, 

 5 [l diam., hyalinis. 



"On bark of tree, Morne Niger Maron [Dominica]. Sept. 

 1892. No. 323. 



"This species seems to form a transition between the forms 

 with a rugulose hymenium such as C. Malbranchei, Pat., and 

 genera with regular gills such as Lentinus; the incurving margin 

 and the shape of the immature specimens have decided the placing 

 it in Cyphella." 



C. sessilis Burt, n. sp. 



Type: in Mo. Bot. Gard. Herb. 



