MURRILL ! BOLETACEAE OF NORTH AMERICA 



13 



Leccinum lactifluum S. F. Gray, Nat. Arr. Brit. PL i : 647. 

 1821. 



Boletus collinitus Peck, Ann. Rep. N. Y. State Mus. 23: 129. 

 1872. 



Boletus albus Peck, Ann. Rep. N. Y. State Mus. 23: 130. 1872. 



(Type from the Adirondacks, New York.) 

 Boletus viscosus Frost, Bull. Buffalo Soc. Nat. Hist. 2: 101. 



1874. (Type from Vermont.) Not B. viscosus Venturi. 

 Boletus punctipes Peck, Ann. Rep. N. Y. State Mus. 32 : 32. 



1879. (Type from Gansevort, New York.) 

 Boletus brevipes Peck, Ann. Rep. N. Y. State Mus. 38: no. 



1885. 



Viscipellis granulata Quel. Ench. Fung. 156. 1886. 

 Ixocomus granulatus Quel. Fl. Myc. Fr. 412. 1888. 



This species is common in Europe and throughout the United 

 States and Canada, occurring in scattered groups in open woods, 

 especially under or near pine trees. The surface of the cap is 

 very viscid and usually of a brownish color when moist, becom- 

 ing yellow on partial drying ; the stem and tubes are yellowish, 

 and exude viscid dots which become black on drying. There is 

 an albino form, to which Peck gave the name Boletus albus. In 

 Boletus viscosus of Frost, the stem is rather shorter than usual, 

 a character which Peck kept in mind when he rechristened the 

 species Boletus brevipes. 



2. Rostkovites subaureus (Peck) 



Boletus subaureus Peck, Ann. Rep. N. Y. State Mus. 39 : 42. 



1886. (Type from Day, New York.) 

 Boletus Americanus Peck, Bull. N. Y. State Mus. i 2 : 62. 1887. 



(Type from New York.) 

 Boletus flavidus Peck, Ann. Rep. N. Y. State Mus. 23 : 129. 



1872. 



This species resembles R. granulatus in appearance and also 

 in habitat. It does not occur in Europe, although it has very 

 commonly been referred to B. flavidus. In its usual form, the 

 cap is yellow and dotted or streaked with brilliant red, the stem 

 being slender, yellow, and covered with reddish-brown, viscid dots 

 which become black on drying. There are forms, however, 

 which are distinguished with difficulty from R. gramdatus. 



