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Boletus griseus PVost. 



Quite common in open places in woods. 



This species is very similar to B. retipcs, but is easily distin- 

 guished in the field by its pure white tubes, those of B. retires 

 being decidedly yellow. The cap is gray and the stem usually 

 whitish. Edible. 



Boletus indecisus Peck. 



One of the most common species, occurring in clusters and 

 colonies especially in clayey soil along the edges of exposed 

 roads and trails. 



This species is closely related to B.fclleus, from which it is 

 distinguished by its mild taste, that o{ B. fellcus being decidedly 

 -bitter. 



Boletus luridus Fries. 



Collected in abundance, especially on clay banks along roads. 



This species, said to be very poisonous, may be at once distin- 

 guished from the other species mentioned here by the reddish- 

 orange mouths of its tubes, the interior of the tubes being yel- 

 low. When cut, the entire cut surface of cap, tubes, and stem 

 changes at once to blue. All boleti with red or reddish tube- 

 mouths should be avoided when collecting mushrooms for food. 



Boletus luteus L. 



Collected three times in open sandy soil in woods. 



Cap very viscid, yellowish brown ; tubes and stem yellow, the 

 latter dotted and also provided with a large white annulus. This 

 is a well-known and widely distributed edible species commonly 

 found in coniferous woods. 



Boletus miniato-olivaceus Frost. 



Rather common in open woods near roads and trails. 



Cap vermilion, tubes bright yellow, stem yellow with pink 

 markings. This species is easily distinguished among the red 

 boleti by its quick change to blue at any point, either outside or 

 inside, where bruised or even touched with the fingers. It is 

 reported from New England south to West Virginia, and is said 

 to be poisonous. 



