1919] 



BURT THELEPHORACEAE OF NORTH AMERICA. XI 265 



Key to the Species 



Fructification elliptical, white; spores 6-7X2^-3 ^; on tree fern I.E. Dussii 



Fructification interruptedly effused, sulphur-yellow; spores 9-12x7-9 /u; on 



palmetto 2. E. sulphurea 



i. Epithele Dussii Patouillard, Essai Taxon. Hym. 59. 1900; 

 Duss, Fl. Crypt. Antilles Fr. 226. 1903. 



Hypochnus Dussii Patouillard, Myc. Soc. Fr. Bui. 15: 202. 

 1899; Sacc. Syll. Fung. 16: 197. 1902.— Peniophora Dussii 

 (Patouillard) v. Hohn. & Litsch. K. Akad. Wiss. Wien Sitzungs- 



ber. 116: 749. textf. 2. 1907. 



Fructification resupinate, very thin, strongly adhering, form- 

 ing a coating well defined, white or whitish, 3-15X3-4 mm.; 

 fascicles very numerous, erect, white, 20-25 n in diameter, pro- 

 truding up to 100 n, composed of hyphae; basidia 2- or 4-spored, 

 13X6 ju; spores hyaline, even, attenuated towards the apex, 

 6-7X2§-3 m; layer between hymenium and substratum about 

 20 n thick. 



On dead trunks of tree ferns. Guadeloupe and Venezuela. 



The type, which I have not seen, was collected on the dead 

 trunk of Alsophila aspera. The collection from Venezuela, 

 cited below, although lacking spores, has the characteristic 

 hyphal fascicles of Epithele Dussii and agrees well with Patouil- 

 lard's description except in being broadly effused. This speci- 

 men is 10 cm. long, \\ cm. wide, and broken off with the sub- 

 stratum along one side and at both ends; hence the fructifications 

 probably become long and widely effused. 



Specimens examined: 

 Venezuela: Mt. El Val, A. F. Blakeslee, J 2, comm. by W. G. 



Farlow (in Mo. Bot. Gard. Herb., 13614). 



2. E. sulphurea Burt, n. sp. 



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



Fructifications resupinate, interruptedly effused, drying pale 

 sulphur-yellow to marguerite-yellow; in structure 300 y. thick, 

 composed of loosely interwoven, thick-walled, hyaline hyphae 

 2-3 ju in diameter ; fascicles about 9 to a mm., 15-30 n in diameter, 

 protruding up to 100 n, composed of hyaline hyphae; basidia 



