116 THE CHICAGO ACADEMY OF SCIENCES 



white changing to ferruginous in drying. The fructification ap- 

 pears to be annual and is soon destroyed by larvae. The context 

 when fresh is pure white, but assumes brownish tints upon ex- 

 posure or where broken. 



Externally resembling F. connatus, but in that the pores are 

 stratose. 



Polyporus chioneus Fr. 



Pileus fleshy, soft, becoming even, smooth, zoneless, often 

 extended behind, margin inflexed. 



Pores very small, short, round, equal, entire. Hyaline-white 

 when moist, shining- white when dry. Spores white, oval, 21 

 x 3 A*. (W. G. S.) 



On dead trunks, Winfield. Not common. The context in 

 the dried plant is of uniform texture, not fibrous, soft, cutting 

 like chalk. Pilei dimidiate, 2.5 to 3 cm. broad; pores 3 to 5 mm. 

 long, about half the thickness of the pileus. Spores not seen. 



Polyporus dichrous Fr. (Plate XVI, Fig. 1.) 



Pileus fleshy-tough, thin, soft, effused-reflexed, even, silky, 

 white. 



Pores short, minute, round, obtuse,, brown-cinnamon. 



Pileus 2.5 to 5 cm. in breadth, projecting 2 cm. or less, but 

 often laterally effused and confluent to the extent of several 

 centimeters. 



On dead trunks, Glen Ellyn and Evanston. August. The 

 surface of the mature plant becomes pallid and -the pores brown- 

 ish-purple or almost black. 



On account of the waxy-gelatinous character of the pores, it 

 has been made by Montagne the type of a new genus and de- 

 scribed in Cuban Fung. p. 385, as Gloeoporus conchoides. 



Polyporus distortus Schw. 



Pilei numerous, subdimidiate, distorted, auriform or orbicular, 

 covered all over by the pores which are white, becoming pallid, 

 minute, sinuate, rather soft, and which often grow upon the 

 margin of the pileus, rendering it thick and porose, and run down 

 on the spongy, coriaceous stipes. Frequently destitute of a 

 pileus, being everywhere porose and clavate or cylindrical. 



At the base of stump of Quercus alba, and extending into the 

 grassy ground near the stump. Woodland pasture, Lombard. 

 November. 



The specimens so referred were soft and spongy when fresh, 

 white, but becoming brownish where rubbed or bruised. The 

 sporophore is without definite shape, composed chiefly of irregu- 

 larly superimposed layers of pores, forming a tuberculose or nodu- 

 lose mass. The pores are sinuate and very variable in size. 

 Prof. Peck states that his P. abortivus is a form of this species. 



