Murrill: Boletaceae of North America 



15 



This species is quite common in sandy soil in open woods 

 throughout this country and Europe. It is one of the few boleti 

 that dry easily, the same being true also of G. cyanescens. 



9. Tylopilus Karst. Rev. Myc. 3°: 16. 1881 

 Dictyopus Quel. Ench. Fung. 159. 1886. (Type species, Dicty- 

 opus felleus (Bull.) Quel.) 

 Rhodoporus Quel. Fl. Myc. Fr. 420. 1888. (Type species, 

 Rhodoporus felleus (Bull.) Quel.) 



Hymenophore annual, terrestrial or rarely epixylous, centrally 

 stipitate ; surface dry, glabrous or minutely tomentose : context 

 white, fleshy, sometimes bitter; tubes small, angular, white, be- 

 coming flesh-colored from the spores, not covered with a veil : 

 spores oblong-ellipsoid, smooth, rosy or flesh-colored, rarely in- 

 clining to ferruginous : stipe solid, even or reticulated. 



Type species, Tylopilus felleus (Bull.) Karst. 



Pileus yellow to brown. 



Sporophore large ; stipe i cm. or more thick. 



Context decidedly bitter. i. T. felleus. 



Context not bitter. 2. T. indecisus. 



Sporophore usually small ; stipe about 5 mm. thick, never 



reticulate. 3. T. gracilis. 



Pileus black or blackish ; tubes becoming blackish when 



wounded. 4. T. alboater. 



i. Tylopilus felleus (Bull.) Karst. Rev. Myc. 3°: 16. 1881 



Boletus felleus Bull. Herb. Fr. pi. 379. 1787. 



? Boletus uwdestus Peck, Ann. Rep. N. Y. State Mus. 25: 81. 



1873. (Type from New York.) 

 Boletus ferrugineus Frost, Bull. Buffalo Soc. Nat. Hist. 2 : 104. 



1874. 



Dictyopus felleus Quel. Ench. Fung. 159. 1886. 

 Rhodoporus felleus Quel. Fl. Myc. Fr. 420. 1888. 



This species is abundant and widely distributed both in this 

 country and in Europe. Specimens have been frequently found 

 over a foot in diameter. It is said to be poisonous. 



2. Tylopilus indecisus (Peck) 



Boletus indecisus Peck, Ann. Rep. N. Y. State Mus. 41 : 76. 

 1888. 



