608 POBIA. POLYSTICTUS 



2039. P. bathypora (Kostk.) Massee. Kostk. Polyp, iv, t. 59, as 

 Polyporus bathyporus Rostk. ftadvs, deep; TTO/DO?, a pore. 



P. 7-8 cm., white, effused; margin thin, byssoid. Pores white, be- 

 coming brownish, rather large, cup-shaped, toothed, sometimes stra- 

 tose. Dead oak, and beech branches. Rare. 



2. POLYSTICTACEAE. 



Hymenium lining tubes, or covering gills, or teeth, homogeneous 

 with the substance of the pileus, not forming a distinct layer, sterile 

 on the edge. 



Polystictus Fr. 

 (7roi\vo'TiKTo<;, with many punctures.) 



Pileus coriaceous, membranaceous, or somewhat spongy, dimidiate, 

 sessile, surface often zoned. Tubes homogeneous, developing from 

 the centre outwards. Spores white, elliptical, pruniform, oblong, or 

 oblong-elliptical; smooth, or punctate. Cystidia sparse, or none. 

 Annual. Growing on wood, often imbricate. 



2040. P. hirsutus (Wulf.) Fr. Hirsutus, hairy. 

 P. 38 cm., whitish, often brownish or tawny at the margin, some- 

 times becoming blackish with age, dimidiate, convexo-plane, often im- 

 bricate, shaggy with rigid hairs, furrowed with concentric and con- 

 colorous zones. Tubes whitish, short; orifice of pores whitish, becoming 

 brownish or yellow, round, or angular, obtuse. Flesh whitish, thin, 

 very coriaceous, soft. Spores white, oblong elliptical, 6-7 x 2-5-3/x. 

 Trunks, and stumps. June March. Not uncommon, (v.v.) 



2041. P. velutinus Fr. Velutinus, velvety. 

 P. 25 cm., white, becoming yellowish or greyish, dimidiate, plane 



on both sides, minutely velvety, or pubescent, with obscure, slightly 

 darker zones; margin thin, acute. Tubes white, or yellowish, very short; 

 orifice of pores concolorous, round, minute. Flesh whitish, thin, corky 

 coriaceous, then rigid. Spores white, oblong elliptical, 6-8 x 2-2-5/i. 

 Birch, beech, and willow trunks, and stumps. Sept. Dec. Uncom- 

 mon, (v.v.) 



2042. P. zonatus Fr. tyvr), a belt. 

 P. 3-8 cm., pale tan colour, margin becoming whitish, dimidiate, 



convex, tuberculose and gibbous behind, villose, or pruinose, opaque, 

 somewhat zoned with ochraceous and grey bands. Tubes whitish, short ; 

 orifice of pores whitish, becoming ochraceous bistre, small, round, or 

 angular, obtuse. Flesh whitish, corky, rather thick. Spores white, 

 elliptical, 5-6 x 3-4/t. Elms, birches, and poplar trunks, and stumps. 

 June Nov. Uncommon, (v.v.) 



