CLASSIFICATION 421 



On dead wood, often spreading over the whole of a faUen log. 

 Our brightest and finest species. 



H. corrugata. — Broadly effused, thin, following closely the irregu- 

 larities of the matrix, pale cinnamon, velvety ; hymenium dark 

 brown, rusty or cinnamon-colour. Cracked into polygonal areas 

 when dry and old. Spores coloured. 



Broadly effused, closely adnate and following the irregularities 

 of the matrix ; hymenium varying from dark brown, through 

 ferruginous to cinnamon and dirty grey when dry. There is no 

 tinge of purple present. Cracked into polygonal areas when dry. 



On wood. 



H. croceo-ferriiginea. — Broadly effused, encrusting, very thin and 

 closely adnate," varying from rusty orange to brownish ; hymenium 

 very minutely velvety, cracked when dry ; spores coloured. 



Margin sometimes byssoid, at others indeterminate ; resembling 

 H. corrugata, but differing in microscopic characters, viz. the very 

 much swollen bases of the setae and the subglobose spores. 



On dead rose stems, etc. 



H. stevensoni. — Rigid, edge blunt and thickened, or sometimes 

 slightly raised ; hymenium livid or greyish pink with a tinge of 

 lilac when dry ; spores colourless. 



On yew. Patches about i in. across. 



H. juliginosa. — Effused, coriaceous, compact, obscure, smoky 

 brown ; hymenium even, densely setulose, thin, closely adnate to 

 the matrix, margin very thin, yellowish rust-colour, often much 

 broken up into patches and almost indeterminate ; hymenium 

 umber, with a rusty or purple tinge, appearing almost smooth 

 under a lens, sometimes minutely cracked and brighter in colour ; 

 spores colourless. 



On wood. 



H. nigrescens. — ^Patches flattened, solitary or in groups, some- 

 times growing into each other, rigid, edge sometimes free and 

 slightly turned up ; hymenium setulose, brown, then blackish ; 

 spores colourless. 



Subcircular, 1-2 in. across, adnate, but the edge often free and 

 upturned, almost smooth and greyish below ; commencing as 

 circular patches which often grow into each other, often radially 

 cracked through the entire substance ; hymenium blackish umber, 

 setulose. 



On dry wood. 



H. crassa. — Coriaceous, pale rufous, edge thickened and usually 

 at length free from the matrix ; hymenium unequal. Velvety, 

 rufous. 



Patches from 1-2 in. across. Known by the more or less free, 

 thickened margin and more especially by a microscopic character. 



