1921] The Thelephoraceae of North Carolina 163 



Basidia 4.8-5.5[jl thick, 4-spored, sterigmata very delicate. Cys- 

 tidia oval to club-shaped, set with crystals, imbedded. Spores a 

 clear salmon color, sausage-shaped, 2.5-3.4 x 7.4-9.5[jl. 



Our No. 4045 when compared with plants in the Curtis Herbar- 

 ium and with others in the New York Botanical Garden Herbarium 

 labelled C. cinereum agreed exactly. Bresadola (I.e., p. 104) gives the 

 spores as 2.5-3 x 8-11[jl, cylindrical and curved. 

 4045. On bark of dead branch of Crepe Myrtle, January 28, 1920. (Described 



above.) 

 4299. On bark of fallen oak limb, May 9, 1920. Spores curved-elliptic, 2.8-3.5 X 



7-8.5m. 



Common on bark of limbs. Curtis (as Corticium). 



7. Peniophora mutata (Pk.) Bres. In Bourdot and Galzin, Bull* 

 Soc. Myc. Fr. 28: 399. 1912. 



Plates 17 and 32 



Extensively encrusting the bark, forming large, thickish patches 

 up to 20 cm. or more long and 6 cm. broad; white, then buff or 

 ochraceous-buff, when wet nodulated and veined, but shrinking on 

 drying and becoming plain, the smooth hymenium cracking to show 

 the pure white, fibrous layer below which rarely cracks all the way 

 through. Margin very thin and fading away to a film. Plant about 

 0.2-0.25 mm. thick, of which about half is the hymenium, the other 

 half the white fibrous layer. 



Spores white, rod-elUptic, 3.4-4.2 x 10-13. T^ji.. Basidia 7.7-8[x 

 thick. Cystidia very few and scattered, mostly deep in the hymen- 

 ium, a very few at the surface, club-shaped and covered with crystals. 



This agrees in all respects with Peck's Corticium mutatum. Plants 

 so determined at the New York Botanical Garden are the same as 

 ours, and the careful description of Bourdot and Galzin agrees in all 

 important particulars. They give the spores as averaging slightly 

 longer, 3-5 x 8-16[jl. There is also little doubt that this is P. suh- 

 gigantea (Berk.) Massee, which was described by Berkeley from a 

 collection of Ravenel on Magnolia glauca. Our plants are exactly 

 Uke those distributed by Ellis on bark of Magnoha (N. Am. Fungi, 

 No. 717). Another specimen on beech from Pennsylvania (at the 

 New York Botanical Garden), which looks the same, was determined 

 by Cooke as this. He says it is near Corticium laeve. A collec- 

 tion labelled C. laeve Fr.irom. Society Hill, S. C, on Magnolia glauca 

 by Curtis is identical as is also a plant that Ellis distributed in his 



