SAPROPHYTIC FUNGI OF EASTERN IOWA. i^ 



hairs, of one color, whitish, but zonate with concentric fur- 

 rows; pores round, obtuse, whitish or sub-fuscous. 



A very widely distributed species and apparently quite vari- 

 able, on wood of all sorts, perhaps our most common Polypore. 

 The hirsuteness here is very soft not at all "/^/7/5 rA«/V//V," 

 suiTiTestinir rather velvet, as if P. vchithms, from which it is 

 said to be entirely distinct on account of obtuse margin and 

 pores. The pilei are dimidiate more or less imbricate, at first 

 thick, the pores luteous. With age the pileus becomes thinner 

 and the hymenium passes through sooty to pallid. Specimens 

 on limbs occasionall}' occur completely orbicular attached by 

 the apex. The color is some shade of brown becoming jel- 

 lowish and pallid. N. A. F. 311. 



3. Poi.vsTiCTUS zoNATUs Frics. 



Pileus suberose-coriaceous, convex, tuberculose and gibbous, 

 behind, subzonate villous, opaque; margin becoming white; 

 pores minute, round or angulate, obtuse, whitish. 



Resembling somewhat the last species but having much 

 larger pores. In habit this species resembles P. aduslns; it is 

 often imbricate and sometimes wholly resupinate. The color 

 is pallid above, below at first white, at length slaty or bluish. 

 A very distinct and handsome fungus, not common. 



4. PoLYSTiCTus VERsiC(0LOR [LiiDueus) Pn'cs. 



Pileus coriaceous, thin, rigid, applanate, depressed behind, 

 smooth, velvety, shining, marked by diversely colored zones; 

 pores minute, round, acute, lacerate, -white then pallescent-yel- 

 lowish. 



This is another cosmopolitan species and is at the same time 

 subject to widest variation even in the same district. Our 

 typical form is thin, semi-circular in outline, lustrous-silky above 

 with concentric bands of various shades, among which blue- 

 black and brown predominate. In some cases the pilei are 

 fiabelliform, cespitose, forming rosette-like tufts several inches 

 in diameter. Other specimens lack the darker tints entirely. 

 Again, old plants are collected which are hoary iiirsute, quite 



