[Vol. 12 

 254 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



4: 165. 1832; Sacc. Syll. Fung. 11: 112. 1895. Cor ticium 

 rhodellum Peck, N. Y. State Mus. Rept. 42: 122. 1889. Peni- 

 ophora rhodella (Peck) Sacc. Syll. Fung. 9: 239. 1891. Penio- 

 phora Karstenii Massee, Linn. Soc. Bot. Jour. 25: 153. 1889. 

 Corticium calotrichum Karsten, Rev. Myc. 10: 73. 1888; Soc. 

 pro Fauna et Fl. Fenn. Meddel. 16: 21. 1888; Icones Hym. 

 Fenn. 3: 7. pi. 4, f. 71. 1891; Sacc. Syll. Fung. 6: 617. 1888; 

 9: 232. 1891. PeniophorarhodochroaBres&dola,, Mycologia 17: 

 70. 1925. Peniophora leprosa Bourdot & Galzin, Soc. Myc. 

 Fr. Bui. 28: 394. 1913. 



Type: in Schweinitz Herb, and Farlow Herb. 



Fructifications effused, adnate, becoming russet to Natal 

 brown in the herbarium, sometimes cracked, the margin paler; 

 in section typically vinaceous russet but sometimes not colored, 

 150-400 [l thick, 2-layered, the layer next to substratum 100- 

 300 (jl thick, composed of loosely interwoven, thin-walled hyphae 

 4-8 p in diameter, with many rough-walled or incrusted, the 

 hymenial layer very dense, typically colored, bearing the cys- 

 tidia; cystidia hyaline or slightly colored, incrusted, 40-80 X 

 10-14 [a, protruding up to 50 [i; spores hyaline, even, 4-5 X 2- 



Fructifications 4-10 cm. long, 2 cm. broad. 



On rotting wood and bark of Juglans, Quercus, and other fron- 

 dose species, rarely on conifers. Canada to Alabama and west- 

 ward to British Columbia and California, and in Mexico; occurs 

 in Europe also. July to December. Frequent. 



P. coccineo-fulva has been confused with P. velutina, from which 

 it differs when best developed, in more intense color, the vinaceous 

 subhymenial layer often showing this color on edges of cracks in 

 the fructification, and in the incrusted hyphae. Paler specimens 

 which are not otherwise distinguishable from P. velutina I have 

 now referred to P. coccineo-fulva when they have the large, in- 

 crusted hyphae of the latter, for the European concept of P. 

 velutina, as shown by specimens under this name in Kew Herba- 

 rium and communicated to me by Bourdot, Bresadola, Romell, 

 and Litschauer, has the hyphae not incrusted, with the exception 

 of additional specimens from Bresadola and Romell which they 

 distinguished as different from P. velutina by labelling as u Peni- 



