140 THE CHICAGO ACADEMY OF SCIENCES 



Hymenium sprinkled with very thin cinereous pruina. Spores 

 oblong or elongated, cylindrical, curved, 3 to 5 x 1 ft. (K.) 



On Ribes rotundifolia. River Forest. June. Harper. 

 Peniophora filamentosa B. & C. 



Effused, membranaceous, separable from the matrix; border 

 and underside soft-tomentose, fibrillose, pallid. 



Hymenium pulverulent, ochraceous or somewhat olivaceous, 

 minutely cracked when dry. 



Subiculum of soft tomentose threads, on which the hymenium 

 forms a thin stratum. 



On dead sticks, Riverside. October. Harper. 

 Peniophora laevis Fr. 



Effused, membranaceous, separating, villous beneath, cir- 

 cumference flaxy. 



Hymenium even, smooth, somewhat flesh-color or livid. 

 Spores 12 x 8 to 10 //.. 



On bark of Quercus and on dead sticks. Near Chicago. 

 Harper. 

 Peniophora incarnata Fr. 



Waxy, becoming rigid, agglutinated, indeterminate, circum- 

 ference radiate. 



Hymenium persistently bright-colored (red or orange), 

 sprinkled with very thin, somewhat flesh-colored pruina. Spores 

 ellipsoid or oblong-ellipsoid, 9 to 12 x 5 /x. 



On decaying branches. River Forest. June. 

 Peniophora Allescheri Bres! 



Broadly effused, waxy-membranaceous, adherent, at length 

 seceding, forming a white then cream-colored crust, margin 

 tomentose-fibrillose. 



Hymenium velvety, subtuberculose, collapsing when dry, 

 smooth, cracking into polygonal areas. Basidia clavate, 30 to 

 45 x 6 to 9 fi., spores very variable in size, oblong, unilateral or 

 depressed on both sides, 7 to 18 x 3J to 6J /x. 



Similar in appearance to Corticium lacteum Fr., but clearly 

 distinct in the character of the spores and in the presence of 

 cystidia. 



On log of Tilia americana. River Forest. July. Harper. 



Peniophora heterocystidia Burt, found by Prof. Harper on 

 Amelanchier canadensis at Glencoe, has been identified by Prof. 

 Burt. The description has not yet been published. 



CONIOPHORA. 



Plants membranaceous, resupinate ; hymenium fleshy or waxy, 

 but at maturity dusted with the smooth, colored spores; spore- 

 membrane yellowish-brown. 



Hymenium ochraceous, pulverulent C. arida. 



Hymenium tawny-brown, waxy C. suffocata. 



