108 THE CHICAGO ACADEMY OF SCIENCES 



Fomes connatus Fr. 



Pileus corky-woody, effused-reflexed, scalari-imbricate, con- 

 crescent, villous, white or cinereous; context and pores stratose. 

 Pilei 5 to 12 cm. broad, often reflexed 5 to 7 cm. 



Near the base of trunks of Acer saccharum L., woods, Glen 

 Ellyn, September, 1902. Pileus ashy- white, velvety becoming 

 glabrous, not villous; pore surface uneven, becoming pale-ochra- 

 ceous in drying, the tubes 2 to 3 mm. in length; in the older, 

 interior strata ochraceous. Heavy when fresh but light and corky 

 when dry. Perennial, the specimens of several years' growth 

 imbricated and connate, with the upper surface overgrown with 

 mosses and algae. 



Fomes populinus (Schum.) Cke., is said to resemble this in 

 habit, but differs in having the pores not stratose. 



Fomes applanatus Pers. (Plate XI, Fig. 2.) 



Dimidiate; pileus large, corky-woody, convex-plane, tuber- 

 culate-nodulose, glabrous, at length concentrically sulcate, with 

 a shining crust, at first milky-white then cinereous with faint 

 obscure lines; margin obtuse, sterile; context floccose-corky, 

 chestnut-brown. 



Pores very small, at first white then becoming fuscous, the 

 mouths white within. 



Pileus 3 dm. or' more across, 13 to 15 cm. long, often a deci- 

 meter thick behind. 



On old logs and stumps of various trees. Our most common 

 Fomes. Context rich umber, pores ferruginous-fuscous. The 

 pore surface of the growing plant is pure white, often presenting 

 a smooth layer covering the entire under surface of the fungus. 

 Etchings made upon the fresh hymenium are permanent, the 

 lines traced by the needle quickly turning to sepia-brown. Prof. 

 Geo. F. Atkinson, in Ann. Myc. 6: 179, says that the American 

 plant is clearly the same species as the European F. applanatus, 

 therefore Polyporus megaloma Lev. and P. leucophaeus Mont, are 

 synonyms; that the earliest name yet known is Boletus lipsiensis 

 Batsch. Professor Atkinson refers the species to the genus 

 Ganoderma. 



Fomes fulvus Scop. 



Pileus tawny, at length becoming hoary, woody-corky, very 

 hard, exactly triangular, even, at first hairy or villous. 



Pores curt, round, minute, cinnamon, at first covered with 

 cinereous-yellow pruina. 



On dead Crataegus. River Forest. When growing on the 

 underside of a log, it is often wholly resupinate. The pore- 

 surface in young plants has a grayish-cinnamon tint, not seen in 

 F. igniarius at any stage of its growth. 



