14 Murrill: Boletaceae of North America 



3. Rostkovites hirtellus (Peck) 

 Boletus hirtellus Peck, Bull. N. Y. State Mus. 2: 94. 1889. 

 (Type from New York.) 



This rare species was at first confused by Peck with R. sub- 

 aureus, but it is easily recognized by its hirtellous pileus. It is 

 known to occur in sandy soil under pines in New York and 

 Connecticut. 



8. Gyroporus Quel. Ench. Fung. 161. 1886 

 Suillus Karst. Bidr. Finl. Nat. och Folk 37: 1. 1882. (Type 



species, Suillus cyanescens (Bull.) Karst.) 



Hymenophore annual, terrestrial, centrally stipitate; surface 

 dry, minutely tomentose to floccose-squamose : context white, less 

 compact than in most members of the family and therefore dry- 

 ing more readily ; tubes free, small, cylindrical, white, not covered 

 with a veil : spores ellipsoid, smooth, white, at length pale-yellow : 

 stipe soft and spongy within, usually becoming hollow. 



Type species, Gyroporus cyanescens (Bull.) Quel. 



Flesh quickly changing to blue when wounded; pileus gray- 

 ish-yellow, floccose. 1. G. cyanescens. 



Flesh white, unchangeable ; pileus reddish-brown, nearly 



glabrous. 2. G. castaneus. 



1. Gyroporus cyanescens (Bull.) Quel. Ench. Fung. 161. 



1886 



Boletus cyanescens Bull. Herb. Fr. pi. 369. 1787. 



Boletus constrictus Pers. Syn. Fung. 508. 1801. 



Leccinum constrictum S. F. Gray, Nat. Arr. Brit. PI. 647. 1821. 



Boletus lacteus Lev. Ann. Sci. Nat. III. 9: 124. 1848. 



Suillus cyanescens Karst. Bidr. Finl. Nat. och Folk 37: 1. 1882. 



This is a very distinct species, easily known by the deep-blue 

 color which its flesh and tubes assume when wounded. It occurs 

 quite commonly in woods and open places throughout eastern 

 Canada and the northern United States from Maine to Minnesota 

 and south to North Carolina. 



2. Gyroporus castaneus (Bull.) Quel. Ench. Fung. 161. 1886 

 Boletus castaneus Bull. Herb. Fr. pi. 328. 1786. 



Suillus castaneus Karst. Bidr. Finl. Nat. och Folk 37: 1. 1882. 



