2 Cincinnati Society of Natural History. 



2. T. RIGIDA, B.and Mont. Pileus corky, undulate, by far 

 the greater part resupinate ; the margin short, acute, subzonate, 

 tavvny-brovvn. Pores medium, round, equal, obtuse, whitish. 



In woods, on the lower side of old trunks*; not uncommon. 

 Often all resupinate and effused for a foot or more, the narrow 

 margin seldom projecting half an inch. The pores are long, round 

 and very regular, measuring about .33 mm. It is an elegant 

 species. 



3. T. SKRiALis, Fr. Pileus stup[)eo-corky, effuso-reflexed, 

 seriately elongated, narrow, confluent, rugose and serobiculate, 

 with appressed hairs, brownish-yellow, the margin white. Pores 

 obtuse, minute, unequal, white. 



On the underside of an old trunk ; no doubt rare. Mostly 

 resupinate, and confluent to the extent of a foot or more, the mar- 

 gin reflexed scarcely half an inch. Perennial, and the first year 

 all white, but these older specimens are cinereous and brownish. 

 Readily distinguished from T. rigida by its minute, unequal j^ores. 

 My specimens are two years old. 



b. Pores large., unequal. 



4. T. SEPiUM, Berk. Pileus coriaceous, normally subtriquet- 

 rous and porrect behind, finely tomentose, pale wood-color, with 

 darker zones. Pores very large, subflexuous, pallid : the dissepi- 

 ments rather thin, but entire. 



On trunks and branches in woods, but more especially on the 

 dry rails and boards in fences. Pileus about half an inch in width, 

 but often effuso-reflexed, and laterally confluent to the extent of 

 several inches, also sometimes wholly resupinate. The context is 

 thin and coriaceous. The largest pores at first are subrotund, with 

 rather thick dissepiments, but these at length become thin and 

 flexuous ; they measure about .7 mm. in diameter. It is the Dae- 

 daka sepiuiii. Berk, of Lea's Catalogue : but it may be well to say 

 that the genus Treiiieies was not at that time established. 



5. T. PAi.LiDO-FULVA, Berk. Pileus corky-coriaceous, rather 

 thin, subimbricate, azonate, minutely pubescent, tawny. Pores at 

 first subrotund, unequal, obtuse ; at length becoming lacerate and 

 elongated, the dissepiments often sublamellate 



In woods on trunks, especially of Sugar Maple. Pileus 1-2 

 inches in breadth, and projecting as much as an inch. Often con- 

 fluent, and much imbricate or effused and resupinate. An elegant 

 resupinate form, with a thin edge, and a wide, sterile border grows 



