388 BRITISH FUNGI 



T. serpens. — Resupinate, white, inseparable, bursting through 

 bark, orbicular, several joining and forming long patches ; pores 

 very shallow, rounded or angular, ruiequal. 



On bark. 



T. mollis. — Resupinate, often broadly effused, thin, separable, 

 edge sometimes reflexed ; pores large, unequal, often torn, pale 

 wood-colour. 



On wood and branches, especially beech. 



T. ferrei. — Resupinate, pulvinate, about 3 in. across, i in. thick 

 in the centre, thinning away on every side to the edge, substance 

 white, corky, firm ; pores angular, rather large, here and there 

 sinuous, pallid. 



A doubtful species, perhaps. 



On beech trunks. 



D.^DALEA 



Substance dry and corky ; hymenium formed of thick, tough 

 plates which are a compromise between gills and pores, being some- 

 times formed of fiat plates, which become variously joined and form 

 irregular pores. 



All the species are dry and woody or corky, and the hymenium 

 consists of very irregular, wavy pores, mixed sometimes with gill- 

 like plates. 



\ D. qiicrcina (PI. XXXI, fig. 5). — Pale wood-colour, corky. Cap 

 irregularly rugulose, irregularly rounded, sessile ; hymenium in- 

 ferior, consisting of thick, springy plates, in some parts resembling 

 gills, in other parts joined by cross-pieces to form long, wavy pores, 

 4-8 in. across. 



On dead oak stumps and trunks. 



D. aurea. — Cap rather thin, coarsely velvety, golden or tawny, 

 slightly zoned ; pores narrow and very wavy, yellow, 1-2 in. across. 



On oak. Often more or less triangular in form. 



D. confragosa. — Corky. Attached laterally, thick at point of 

 attachment, edge thinner, rough, reddish brown ; pores rounded, 

 then narrow and wavy, grey, 2-5 in. across. 



On willow, etc. 



D. cinerea. — Corky. Attached by a broad, thick base, margin 

 thin, silky, zoned, greyish, 1-4 in. across ; pores minute, elongated 

 and very wavy, greyish. 



On dead trunks. 



D. unicolor. — Broadly effused, thin, usually with many imbri- 

 cated or overlapping free portions, velvety, zoned, grey ; pores long, 

 wavy, plates often broken up into teeth. 



Often 3-6 in. wide and extending in an imbricated manner for a 

 foot or more. 



On trunks, stumps, rails, posts, etc. 



