and yellow, yellow under the cuticle, the thin margin at first inflexed, Boletus, 

 then horizontal, curved upward when old. Flesh pale-yellow, chang- 

 ing to blue where wounded. Tubes adnate or slightly depressed around 

 the stem, lemon-yellow and stiiffed when young, becoming yellow and 

 sometimes red at the mouths. Stem small, often flexuous, colored like 

 the pileus, reddish within, white-tomentose at the base. Spores 9-12.5 

 X4-5/*. 



Pileus 2-4 in. broad. Stem 1-3 in. long, 3-5 lines thick. 



Deep woods. Rare. New England, Frost. 



This is apparently too closely related to B. chrysenteron, and it also 

 resembles B. bicolor. Peck, Boleti of the U. S. 



B. frater'nus Pk. Pileus convex, becoming plane or depressed, 

 slightly tomentose, deep red when young, becoming dull red with age. 

 Flesh yellow, slowly changing to greenish-blue where wounded. Tubes 

 rather long, becoming ventricose, slightly depressed about the stem, 

 their walls sometimes slightly decurrent, the mouths large, angular or 

 irregular, sometimes compound, bright yellow, quickly changing to blue 

 where wounded. Stem short, cespitose, often irregular, solid, sub- 

 tomentose, slightly velvety at the base, pale reddish-yellow, paler above 

 and below, yellow within, quickly changing to dark green where 

 wounded. Spores 1 2. 5x6/1*. 



Pileus i-i-5 in. broad. Stem I-I-5 in. l n g, 3-6 lines thick. 



Shaded streets. Auburn, Alabama. July. Underwood. 



The species is apparently allied to B. rubeus, but is very distinct by 

 its small size, cespitose habit, color of the flesh of the stem and by the 

 peculiar hues assumed where wounded. When the pileus cracks the 

 chinks become yellow as in B. subtomentosus. The species belongs to 

 the tribe Subtomentosi. Peck, Bull. Torrey Bot. Club, Vol. 24, No. 3. 



B. subtomento'sus L. sub; tomentosus, downy. Pileus convex or 

 nearly plane, soft, dry, villoso-tomentose , subolivaceous , concolorous be- 

 neath the cuticle, often cracked in areas. Flesh white or pallid. Tubes 

 adnate or somewhat depressed around the stem, yellow, their mouths 

 large, angular. Stem stout, somewhat ribbed-sulcate, scabrous or 

 scurfy with minute dots. Spores 1012.5x4-5^. 



Pileus 1-4 in. broad. Stem 1-2.5 m - long, 2-5 lines thick. 



Common and variable. The pileus is usually olivaceous or yellow- 

 28 433 



