574 POLYPORUS 



APHYLLOPHORALES. 



Hymenium indefinite, increasing by centrifugal growth, fully ex- 

 posed from the first, amphigenous, or unilateral, lining the interior 

 of pores, covering the surface of teeth, tubercles or anastomosing 

 gills, or forming a smooth surface. 



I. POROHYDNINEAE. 



Receptacle pileate, stipitate, sessile, or resupinate; hymenium 

 inferior. 



1. POLYPORACEAE. 



Hymenium lining tubes coherent throughout their length, forming 

 a layer distinct from the substance of the pileus, sometimes becoming 

 torn into teeth, or gill-like plates, and separated by dissepiments 

 sterile on the edge. 



Polyporas (Micheli) Fr. 

 (TToXu?, many; 770^09, a pore.) 



Pileus fleshy, cheesy, coriaceous or corky, often at length becoming 

 hard with age; entire, lobed, excentric, or dimidiate, simple, or 

 branched. Stem central, lateral, or none, simple or branched. Tubes 

 homogeneous, or heterogeneous, long, or short; orifice of pores round, 

 angular, entire, torn, or toothed. Flesh white, or coloured. Spores 

 white, or coloured, elliptical, pip-shaped, globose, subglobose, pruni- 

 form, oblong, or elliptic fusiform; smooth, punctate, or verrucose. 

 Cystidia present, or absent, hyaline, or coloured. Annual, or perennial. 

 Growing on wood, or on the ground ; solitary, caespitose, imbricate, 

 or connate at the base. 



A. Stipitate, or caespitose. 



I. P. thin, hemispherical, generally depressed, cup-shaped. St. thin, 

 fibrillosely corky. Flesh coloured. Tubes homogeneous, short; pores 

 polygonal, or rounded, tawny or brown. Spores hyaline, or yellowish. 

 Cystidia coloured, or wanting. Terrestrial. Perennial. 



*P. tomentose, or velvety. Cystidia coloured. 



1897. P. tomentosus Fr. Kalchbr. Icon. t. 38, fig. 1, as Polyporus 

 Kalchbrenneri FT. Tomentosus, woolly. 



P. 5-10 cm., tawny ferruginous, nankeen yellow, or yellowish cinna- 

 mon, convex, then plane and cyathiform, leathery, zoned, radiately 

 rugose, clothed with tawny ferruginous hairs ; margin thin. St. 2-5 cm. x 

 4-8 mm., fuscous umber, becoming blackish, subequal, firm, pulverulent, 

 or tomentose, sometimes a mere base or central point. Tubes greyish, 

 becoming fuscous, adnate, 1 mm. long; orifice of pores grey, glistening, 



