NATURAL HISTORY SURVEY 139 



Corticium filamentosum B. and C. 



Effused, membranaceous, border and underside soft-tomentose, 

 fibrillose, pallid, separable from the substratum. 



Hymenium pulverulent, ochraceous or somewhat olivaceous, 

 minutely cracked when dry. 



On old bark. Near Chicago. Harper. 

 Corticium jonoides Bres. 



Waxy, adherent, suborbicular, broadly effused, border pubes- 

 cent, soon naked, lilac-amethystine or isabelline brick-color, 

 expallent, canescent. 



Hymenium velutine from the more or less prominent basidia, 

 rimose when old. Spores obovate, hyaline, 10 to 14 x 7 to 9 /*. 



Near Chicago. Harper. 



Corticium colliculosum B. & C. 



Strongly adnate, mycelium spongy, white; hymenium bright 

 ochraceous, papillate and granulate, glabrous, cracked. Spores 

 oblong-ellipsoid, 10 x 5 /x. 



Near Chicago. Harper. 



Corticium albulum Atk. & Burt, and C. subceraceum Burt, 

 species not yet published, have been identified in collections sent 

 to Prof. Burt. 



PENIOPHORA. 



Resupinate, or with the margin free; hymenium even, furnished 

 with projecting, fusiform, colorless cystidia. Spores colorless. 



1. Margin refiexed P. neglecta. 



1. Margin not refiexed 2 



2. Margin adpressed, determinate P. < 



2. Margin free or indeterminate 3 



3. Plant membranaceous 1 



3. Plant crustose or waxy 5 



4. Pallid P. filamentosa. 



4. Flesh-color or livid P. laevis. 



5. Hymenium red or orange P. incarnata. 



5. Hymenium white or cream color P. Allescheri. 



Peniophora neglecta Pk. 



Pileus effused-rcilexed, thin, coriaceous, often Laterally con- 

 fluent, strigose-hairy, concentrically sulcate, grayish or yellowish- 

 gray. 



Hymenium pallid becoming purplish, minutely setulose, the 

 setae short, colorless, rough, stout. 50 to 75 ^. long; spores sub- 

 elliptical, 12. o x 7. 5 /a. 



On dead branches of Hums. Austin. Determined by Prof . 

 Harper. 



Peniophora cinerea Fr. 



Lurid, waxy, becoming rigid, confluent, agglutinated, circum- 

 ference similar. 



