STEREUM. 267 



GENUS XLVI. Stereum (<rrepeJs, hard). (Pers.) Fr. Epicr. stereum. 

 P- 545- 



Hymenium definitely inferior, coriaceous, separated from the 

 fibrous-coated pileus by an intermediate fibrillose stratum, even, 

 remaining unchanged. Sporophores 



4-spored ; spores minute, roundish- --^^S^s^ 



ovate. Coriaceous or woody, mostly "^ 

 perennial, somewhat zoned, entire, ~ft"iSr]-' ^ 



definite in form. Fr. Hym. Eur. p. 

 638. 



I. MERISMA (neptfc, to divide). Pilei 

 very numerous, ascending, imbricated in a 

 free tuft. 



II. APUS (a, TTOVS, a foot). Pileus sessile, 

 at first resupinate, then commonly pileato- 

 reflexed or adnate behind, coriaceous, mar- 

 ginate. 



* Hymenium smooth. 



** Hymenium simple, slightly bristly or 

 velvety. 



*** Woody, perennial, scarcely reflexed, 



but marginate, the hymenium stratose by LXXXVI. Stereum hirsutum. 

 confluent pilei, at the first pruinose. Natural size. 



** Rigid, the simple hymenium pruinose. 



III. RESUPINATA. Crustaceo-adnate, indeterminate, without a distinct 

 pileus, but at length admitting of being detached entire like apiece of leather. 

 Circumference not flaxy. Incrusting wood. (Species of Subdivision II. (Apus) 

 occur in a resupinate state, but being limited (marginate) are from the first 

 distinct.) 



* True species, coriaceous. 



** Imperfect, crustaceo- adnate, sterile. 



I. MERISMA. 

 No British species. 



II. APUS. Pileus sessile, at first resupinate, &c. 

 * Hymenium smooth. 



1. S. ochroleucum Fr. Pileus hoary, coriaceous-membrana- 

 ceous, free, expanded, flaccid, silky, zoned. Hymenium even, 

 smooth, yellowish (or in var. grey). 



Commonly large, with zones of the same colour or fuscous. Coating of the 

 pileus here and there separating. 



On wood. Glamis, 1874. Jan. 



Name cixpo?, pale yellow ; Aewos, white. Fr. Hym. Eur. p. 639. B. 6* 

 Br. n. 1818. S. Mycol. Scot. n. 856. 



