1920] 



BURT THELEPHORACEAE OF NORTH AMERICA. XII 



215 



Cuba : C. Wright, 51 5, the S. scytale of Fungi Cubenses but not 

 according to the type (in Curtis Herb.). 



70. S. sepium Burt, n. sp. Plate 6, fig. 70. 



Type in Burt Herb. 



Fructification corky, drying rigid, hard, resupinate, becoming 

 broadly reflexed, with the upper surface concentrically sulcate, 

 somewhat zonate, tomentose, sepia, 

 the margin paler and entire; hyme- 

 nium even, not shining, between light 

 buff and avellaneous; in structure 

 600-1500 fx thick up to 3 mm. thick 

 in resupinate portion of Mexican 

 specimens , with the intermediate 

 layer bordered and connected with 

 the tomentum by a denser and 

 darker zone and bearing on the op- 

 posite side a hymenial layer which 

 becomes multizonate; hyphae of 

 intermediate layer colored, thick- 

 walled, densely and horizontally ar- 

 ranged, 3-3| m in diameter; cystidia 

 incrusted, cylindric, 25-35X7/*, be- 

 coming colored where buried in the deeper zones of the hyme- 

 nium; paraphyses of bottle-brush or aculeate form, numerous and 

 conspicuous in the hymenial surface, cylindric, 12-25 X 3-5 /* ; 

 spores hyaline, even, 4X2J/z. 



Probably resupinate over large areas, for fragments fractured 

 on three sides are 6 cm. square; reflexed margin 2-4 cm. long, 

 6 cm. wide. 



Under side of rotten logs of frondose species. Pennsylvania 

 to Mexico and Colombia. Collected from July to December 

 but probably perennial. 



The few collections of S. sepium which have been observed 

 have the upper surface of the pileus a little brighter colored than 

 that of S. subpileatum and the hymenium more avellaneous, but 

 I cannot certainly separate the former from the latter except 

 by the very numerous and conspicuous bottle-brush paraphyses 

 which are present, in addition to cystidia, in the hymenium of 



Fig. 41. S. sepium. Hyme- 

 nium of type X 665, showing 

 cystidia, c, and bottle-brush 

 paraphyses, p. 



