1925] 



BURT THE THELEPHORACEAE OF NORTH AMERICA. XIV 215 



and Texas; 2 each from Canada, New Hampshire, Alabama, 

 Florida, Colorado, and Porto Rico; and 1 each from Virginia, 

 Georgia, Kentucky, Montana, Alaska, California, New Mexico, 

 Nicaragua, Cuba, and Bermuda. 



It might be well for American students who use this work for 

 the determination of their gatherings of Peniophora to concen- 

 trate their attention in first attempts on the characters of the 

 species of wide distribution and on such of the new species as are 

 local in their respective regions. 



Mycologists, with special knowledge of the Thelephoraceae in 

 every nation, work not only to make better known the fungous 

 floras of their own countries, but also to determine which of their 

 species occur in other countries. As an aid to such study in the 

 future and for checking my work, there is here given the following 

 list of foreign species of Peniophora, not known to me except from 

 the more or less satisfactory published descriptions, viz., Penio- 

 phora abietis, P. amaniensis, P. atro-cinerea, P. avellanea, P. 

 bambusicola, P. carneola, P. Cheesmanii, P. cineracea, P. citrina, 

 P. coccinea, P. Coffeae, P. convolvens, P. Corsica, P. crustosa, P. 

 diffissa, P. discoidea, P. Dussii, P. fimbriata, P. gigaspora, P. 

 habgallae, P. leprosa, P. lilacea, P. Martelliana, P. mimica, P. 

 ochroleuca, P. orphanella, P. pirina, P. rimicola, P. rufomarginata, 

 P. sordidella, P. sororia, P. sparsa, P. subavellanea, P. subglebulosa, 

 P. sublaevis, P. subtilis, P. tomentella, P. tremelloidea, and P. ver- 

 micularis. It is probable that most of these species are of local 

 interest but I should like to have been sure that I have not re- 

 described any of them as new American species. Much time and 

 effort have been required to make this list as small as it is. 



Key to Arrangement of the Species 



I. Substance not colored, with the usual cystidia, no gloeocystidia. 

 1. Hymenium white or whitish. 

 *At least small pieces separable when moistened. 



a. Cystidia incrusted 1-7 



b. Cystidia not incrusted 8, 9 



**Closely adnate, not separable. 



a. Antler-shaped paraphyses not present. 



fCystidia incrusted 10-18 



tfCystidia rough-walled or denticulate 14, 15 



ttfCystidia not incrusted, even 16-24 



b. Antler-shaped paraphyses present 25-27 



