CORTICIUM. 127 



margin determinate; hymenium glabrous, pale-primrose- 

 yellow ; spores cylindric-ellipsoid, both ends obtuse, 7 X 5 p, 



Corticium flaveolum, Massee, Mon. Thel., p. 150. 



On trunk of tree-fern in a conservatory. Two to three 

 inches broad, suborbicular or variously lobed, clear but pale 

 primrose-yellow. 



Corticium coeruleum. Fr. 



Broadly effused, adnate, tomentose, bright blue, byssoid 

 margin whitish, extreme margin sometimes free ; hymenium- 

 waxy, rather soft, pale when dry ; spores elliptical, 8 X 4 p.. 



Corticium coeruleum, Fries, Hym, Eur., p. 651 ; Mass., Mon. 

 Thel., p. 151. 



Auricularia phospltorea, Sow. t. 350. 



On wood. Irregularly effused, adnate or sometimes the 

 extreme margin free ; margin fibrous, radiating, buff, or 

 whitish ; hymenium when in full vigour intense blue, satiny,, 

 often becoming pale in the centre. Said to be phosphorescent. 



Corticium violaceo-lividum. Fr. 



Forming closely adnate, hard patches 1 in. or more across, 

 dingy reddish- purple, margin paler ; hymenium usually 

 corrugated or tuberculose, covered at first with white-bloom ; 

 spores cylindric-ellipsoid, 8 x 4 /A. 



Corticium violaceo-lividum, Fr., Hym. Eur., p. 655 ; Stev., 

 Brit. Fung., p. 280 ; Mass., Mon. Thel., p. 151. 



On wood. Hymenium dingy purple when dry, not cracked. 



Corticium lividum. Pers. 



Thin, effused, closely adnate, waxy and soft, variously 

 coloured, bluish-grey, dingy purple, &c., margin similar ; 

 hymenium even, naked (not pruinose), subviscid at maturity, 

 cracked when dry ; spores cylindric-ellipsoid, 7-8 X 4 /n. 



Corticium lividum, Persoon, Obs., i. p. 38; Mass., Mon. 

 Thel., p. 152. 



On wood. Distinguished from C. violaceo-lividum by the 

 hymenium not being pruinose, cracked when dry, and by 

 having the margin coloured like the hymenium. 



Corticium atro-virens. Fr. 



Irregularly effused, very thin, blackish-green, under surface 

 and indeterminate margin tomentose, similarly coloured ; 



