404 



THELEPHORACE^E 



Stereum 



minate fibrillose stratum, even, smooth, composed of basidia and 

 hymenial cells compactly arranged side by side and of uniform 

 height. Basidia 4-spored. Spores minute, roundish-ovate, white or 

 coloured. (Fig. 98.) 



Fig. 98. A, B, c, Stereum hirsutum Pers., upper and lower surface and section, two-thirds 

 natural size. D, basidium and spores, X 660. E, F, S. Pini Fr., upper surface and section, two- 

 thirds natural size. 



Coriaceous or woody, mostly perennial, somewhat zoned, entire, 

 definite in form, effuso-reflexed. Species 1806 1818 



a. Apodce. Pileus dimidiate, sessile or at first resupinate, then 



effusedly reflexed, marginate. 1806 1814 



b. Resupinatcz. Agglutinate, effused; marg. not free, or 



scarcely so. 18151818 



a. Apoda. 



1806. S. hirsutum Pers. (from the hairy pileus; hirsutus, hairy) 



a b c. Coriaceous, rigid. 



P. hispid-zoned, effused, reflexed, lobed and crisped, usually 

 ivory-buff varying dull primrose, orange or brownish; marg. 

 subobtuse, white or whitish. Hym. even, smooth, obscurely 

 zoned, juiceless, usually warm-biscuit. 



Imbricate. Stumps, oak, beech, birch, poplar, laburnum. Jan. -Dec. 4 in. 

 Said to cause "fly "-wood and "yellow- and white-piped" wood. Pileus 

 often green at the base from the growth of algre. A deep rose-coloured 

 stain is frequent on this plant caused by a parasitic mould, Hypomyces 

 rosellus. Var. subcostatum Mass. Hym. costate or rugose. Var. cristu- 

 latum Quel. P. strigose, grey. 



