118 -FUNGUS-FLORA. 



ferruginous with a purple tinge, usually ci'acked, minutely 

 velvety; setae conico-acuminate, 80-130 X 10-14 //.; spores 

 elliptical, olive, 5-6 x 3 /A. 



Hymenochaete tabacina, Lev., Ann. Sci. Nat., ser. 3, v. 

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



On trunks, &c. Distinguished 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. Hymenium often 

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

 several starting-points in broadly effused specimens. 



*** Setae subclavate, often rough at the apex with particles of 

 lime. 



Hymenochaete crassa. Cke. 



Resupinate, coriaceous, minutely velvety, pale rufous, 

 margin thickened, at length free ; hymeniuni unequal, 

 velvety, rufous ; setae subclavate, often rough at the apex ; 

 70-130 X 7-14 p.; spores cylindric-ellipsoid, 7-8 x 4 //,. 



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

 Mon. Thel., p. 114. 



Thelephora crassa, Lev., Voy. Bonite, t. 139, f. 1 B. 



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

 more or less free margin and the clavate setae. 



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



Hymenophore broadly effused, entirely resupinate or with 

 the extreme margin free ; hymeniuni smooth, waxy, polished, 

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

 originate directly from the mycelium without an intermediate 

 compact stratum ; spores continuous, colourless. 



Corticium, Fries, Epicr, p. 556 (in part) ; emended in 

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



Thelephora (in part) of most old authors. 



As denned above, the leading features of the genus are : 

 Hymeniuni covering the whole free surface of the fungus, 

 which is closely adnate by the whole of the under surface to 



