118 FUNGUS-FLOEA. 



ferniginotis with a purple tinge, usually cracked, minutely 

 velvety; setae conico-acumiuate, 80-130 X 10-14 /x; spores 

 elliptical, olive, o-O X S jx. 



Hijmenocliaete tahacrna, Lev., Ann. Sci. Nat., ser, 3, v. 

 p. 152 .; Mass., Mon. Thel., p. 112. 



On trunks, &c. Distinguislied by the golden yellow 

 margin and coloured spores. Sometimes almost completely 

 covering the under side of fallen logs. When moist dirty 

 ferruginous passing to mulberry-colour. Eigid when dry, 

 adnate, margin broadly free all round and more or less lobed, 

 or free and reflexed above, rugulose. Hymeninm often 

 cracked when dry in lines radiating from the centre, or from 

 several starting-points in broadly effused sjDecimens. 



*** Setae mhclavate, often rough at the apex imtli particles of 



lime. 



Hymenochaete crassa. Cke. 



Resupinate, coriaceous, minutely velvet}^ pale rufoxis, 

 maigin thickened, at length free; hymenium unequal, 

 velvety, rufous ; setae subclavafe, often rough at the ajiex ; 

 70-130 X 7-14 yu.; spores cylindric-ellipsoid, 7-8 X 4 yu.. 



Hymenochaete crassa, Berk., Cke., Grev. viii. p. 148 ; Mass., 

 Mon. Thel., p. 114. 



llieh'phora crassa, Lev., Voy. Bonite, t. 139, f. 1 B. 



On trunks. From 1-2 in. across, known by the thickened, 

 more or less free maigin and the clavate setae. 



CORTICIUM. Fr. (emended), (figs. 4, 5, p. 94.) 



Hymenophore l)roadly effused, entirely rcsu])inate or with 

 tlie extreme margin free; hymenium smooth, waxy, polished, 

 composed of basidia and paraphyses only (no cystidia), which 

 originate directly from the mycelium withoiit an intermediate 

 compact stratum ; sjiores continuous, colourless. 



Corticium, Fries, Epicr., p. 55G (in part) ; emended in 

 Mass., Mon. Theleph., p. 117. 



Thelcphora (in jiart) of most old authors. 



As defined above, the leading features of the genus are : — 

 Hymenium covering the whole free surface of the fungus, 

 wiiich is closely adnate by the avIioIc of the under surface to 



