Mukrill: Polyporaceae of North America 481 



Hymenophore annual, cpixylous, sessile, zonate, anoderm, 

 hairy or glabrous ; context thin, white, flexible, fibrous, leathery \ 

 tubes thin-walled, white, at length splitting into irpiciform teeth in 

 several species, mouths polygonal or irregular; spores smooth, 

 hyaline. 



The species of this genus will be treated in a later number of 



this series. 



1 6. Coriolellus gen. nov. 



Sephim Berk. 



Hymenophore small, dry, annual, epixylous, semi-resupinate ; 

 surface white, anoderm, usually azonate ; context white, thin, 

 fibrous to corky ; hymenium concolorous, tubes thin-walled| 

 usually large and irregular, dentate, but not irpiciform; spores 



smooth, hyaline. 



Coriolellus Sepium (Berk.) 



Trmnctcs Sepiiivi Berk. Lond. Jour. Bot. 6: 322. 1847. 



Described from specimens collected by Lea on dry fence-rails 

 in Ohio as follows : 



"Pilei effused at the base, reflexed above, laterally connate, at 

 first often attached by the vertex or triquetrous, pale wood-col- 

 oured, finely tomentose, marked with numerous darker zones. 

 Hymenium pallid, consisting of slightly sinuous pores about ^^th 

 of an inch \n diameter." 



This species occurs on various kinds of structural timber and 

 other dead wood, especially of deciduous trees, throughout most 

 of temperate North America. Oak and chestnut posts and poles 

 with the bark removed frequently supply the sporophores in great 

 numbers. Only a {^^ collections are here mentioned : 



Canada, Macon 71 ; Connecticut, Hanni 



^> 



J 



ginia, Miirrill ; South Carolina, Ravenel ; Tennessee, Micrrill ; 

 Ohio, Lloyd ; Kansas, Cragin. 



17^ GRIFOLA S. F. Gray, Nat. Arr. Brit. PL I: 643. 1S21 



Type: Boletus fro7tdostis Dicks. 

 Polypiliis Karst. Rev. Myc. 3^ : 17. 188 1. Type: Boletus fron- 



dosus Schrank. 

 Meripilns Karst. Bidr. Findlands Nat, och Folk 37 : n. 18S2. 



Type : Boletus giganteus Pers. 

 Cladojnej^is Quel. Ench. Fung. 167. 1886. ^y^^: Poly pants 



umbel latus Fr. 



