98 Cincinnati Society of Natural History. 



yellow, subzonate toward the margin. Pores minute, unequal, 

 somewhat angular, milky-white. Spores white .0037X.0055 mm. 



Growing on the ground about the base of trees in damp woods. 

 The whole mass is four to six inches in height, spreading upward 

 and outward all around, with numerous pileoli symmetrically dis- 

 posed, to a diameter of 12 to 16 inches across the upper surface. 

 The common stipe rests bluntly on the ground, scarcely rooting. 

 The single pileoli are 3 — 8 inches broad, with an extent of 2 — 5 

 inches, each stipe an inch or less in length ; the thickness about 

 one-half an inch, thinning out to the edge. 



IV. SuBEROSi. Pileus corky or coriaceous, persistent, tenacious; 

 texture floccose, fomentarious; truncigenous. 



22. P. graveolctis, Schw. Corky or woody and extremely hard, 

 very closely imbricated and connate, forming a subglobose or poly- 

 cephalous mass. Pileoli innumerable, indexed and appressed, 

 plicate, brown. Pores concealed, very minute, round, pale brown ; 

 the di.ssepiments thick and obtuse. 



In woods, on old dead trunks; not uncommon. This remarka- 

 ble fungus consists of innumerable pileoli, forming a subglobose or 

 elongated mass 3 — 6 inches in diameter, and often many inches 

 in length, especially on .standing trunks. When fresh and 

 growing it has a varnished or resinous appearance, and often 

 purplish or reddish tints, with a paler margin. The substance 

 within is ferruginous, rather soft and floccose, but covered by a 

 very hard brown crust. The pores are brown, but lined with an 

 extremely minute white pubescence. The jiilcoli are so closely 

 imbricated and appressed as almost or entirely to conceal the pores. 

 I am unable to separate from this the P. coiiglobatus of Berkeley ; 

 this latter Fries states to be a species of Trametes (Nov. Symb., p. 

 6"]^, while he refers P. gravcolcns to the Merismoidei, 1. c. p. 62. 

 It is called by people "Sweet Knot," but I am unable to verify 

 the popular notion concerning its wonderful fragrance, perceptible 

 at a great distance from the tree on wliicli it grows. When fresh, 

 it has a strong and disagreeable odor, as described by Schweinitz. 



