16 Murrill: Boletaceae of North America 



This species was described from Menands, New York, and has 

 since been reported from New Jersey, Pennsylvania, Kentucky, 

 and North Carolina. I have found it in several localities, usually 

 in thin deciduous woods. Specimens referred to B. alutarius Fr. 

 by American collectors probably belong in this category; but it 

 is difficult to distinguish either species from T. jelleus, except by 

 taste. 



3. Tylopilus gracilis (Peck) P. Henn. 



Boletus gracilis Peck, Ann. Rep. N. Y. State Mus. 24: 78. 1872. 



This is usually a small plant, of slender habit, occurring in 

 woods on the ground or on much decayed logs or stumps. It 

 sometimes attains a diameter of 6 cm., but is easily distinguished, 

 even when of maximum size, by its subferruginous spores. The 

 type specimens were collected near Garrisons, New York; it has 

 since been collected in Nova Scotia, New England, New York, 

 Pennsylvania, West Virginia, North Carolina, Georgia, and a few 

 other eastern states. 



4. Tylopilus alboater (Schw.) 



Boletus alboater Schw. Schr. Nat. Ges. Leipzig 1 : 95. 1822. 

 Boletus nigrellus Peck, Ann. Rep. N. Y. State Mus. 29 : 44. 



1878. (Type from Sandlake, New York.) 



This species is not often collected, but is easily recognized 

 when once seen. It occurs in open deciduous woods in the 

 eastern United States from New York to Mississippi. The 

 type collection was made in North Carolina, and the description 

 was evidently drawn from young plants before the white tubes 

 had been colored by mature spores. 



10. Suillellus gen. nov. 



Hymenophore annual, terrestrial, centrally stipitate ; surface 

 glabrous or nearly so, dry or slightly viscid: context white or 

 yellow, fleshy, very firm, considered poisonous ; tubes usually free, 

 small, yellowish within, their mouths closed when young, and 

 red or orange from the first, not covered with a veil : spores 

 oblong-ellipsoid, smooth, yellowish-brown, sometimes with green- 

 ish tints : stipe solid, usually reticulated or dotted. 



Type species, Boletus luridus Schaeff*. 



