CLADODEREIS. 135 



Stereum acerinum, Fries, Hym. Eur., p. G-io ; Mass., Mon. 

 Thel., p. 202. 



Tliehphora acerina, Persoon, Synop., p, 81. 



On living bark of Acer campestre, also on fallen trunks r)f 

 other trees. Forming a thin white crust, generally sterile. 

 Surface usually covered with minute particles of lime. 



Stereum stratosum. 13erk. & Broome. 



Ejffused, clear pale ochraceous, glabrous, here and there 

 rugose becoming yellowish ; substance pallid, stratified, 

 strata at length separating. 



Stereum stratosum. Berk, and Broome, Ann. Nat. Hist., 

 ser. 5, xii. 1883, p. 574; Mass., Mon. Thel., p. 203. 



Penzance, Britain. No specimen exists in Berkeley's 

 herbarium, hence I am unable to supplement the above 

 scanty diagnosis. 



CLADODEREIS. Pers. (figs. 15-17, p. 97.) 



Pileus coriaceous, with a central stem, or laterally fixed 

 and sessile ; hymenium inferior, with radiating ridges, which 

 are often nodulose ; spores smooth, colourless. 



Cladoderris, Pers., in Fr., Fung. Natal, p. 20. 



Approaching Tliehphora in the radiato-rugulose and nodu- 

 lose hymenium, but distinguished by the firmer substance 

 and elongated, smooth, colourless spores. In Stereum, which 

 the British species superficially resembles, the hymenium is 

 even. 



Cladoderris minima. B. & Br. (figs. 15-17, p. 97.) 

 White, flabelliform, sessile, resupinate ; pileus tomeutose ; 

 hymenium radiato-rugulose ; spores elliptic-oblong, apiculate 

 at base, curved, 14-15 X 4-5 /x. 



Cladoderris minima, B. and Br., Ann. Nat. Hist., ser. 5, 

 p. 24 (1878) ; Stev., B. Fung. ii. p. 226, fig. Ixxxv. 



On bark. From 2-4 lines across, gregarious, becoming 

 yellowish-tan when dry ; looking very much like young- 

 specimens of Stereum hirsuium, distinguished by the un- 

 even liymenium and the large, sausage-shaped, curved 

 spores. 



