American Boletes 29 



5. SuiLLELLUS MoRRisii (Peck) MurriU 



Pileus convex, gregarious or at times subcespitose, 3-8 cm. 

 broad, 1-2 cm. thick; surface dry, finely pulverulent, dark- 

 flavovirens to light-olivaceous, becoming partially or wholly 

 glabrous and dull-reddish-brown; margin thin, inflexed, pro- 

 jecting beyond the tubes, often radially cracked ; context flavous, 

 unchanging, rather thin, sweet; tubes long, flavous to melleous 

 or greenish-yellow, much depressed near the stipe, mouths sub- 

 circular, the extreme edges usually distinctly orange or testa- 

 ceous; spores oblong-fusiform, smooth, yellowish-green, 12-14 

 X4-5M; stipe subfusiform, flavous, distinctly punctate with 

 reddish dots nearly to the apex, solid, yellow or dark-purplish 

 within, 4-8 cm. long, 8-12 mm. thick. 



Occasional in deciduous or mixed woods in Massachusetts, 

 New Jersey, Ohio, and Kentucky. 



5. ROSTKOVITES P. Karst. 



Hymenophore annual, terrestrial, stipitate; surface viscid, 

 glabrous or hirtellous; context fleshy, yellowish; tubes adnate, 

 angular, yellow, not covered with a veil, exuding viscid drops 

 which blacken on drying; spores oblong-ellipsoid, smooth, 

 yellowish-brown; stipe solid, glandular-dotted, exannulate, not 

 reticulate. 



Pileus glabrous or nearly so. 



Pileus brown when moist, yellowish on drying; stipe over 8 



mm. in diameter. i. R. granulatus. 



Pileus yellow, often streaked with bright-red; stipe usually 



slender, 8 mm. or less in diameter. 2. R. subaureus. 



Pileus adorned with conspicuous tufts of hairs. 3. R. hirtellus. 



I. ROSTKOVITES GRANULATUS (L.) P. Karst. 



Pileus subhemispheric to nearly plane, gregarious, rarely 

 cespitose or solitary, 4-10 cm. broad, 1-1.5 cm. thick; surface 

 very viscid, with easily separable cuticle, very variable in color, 

 usually pinkish-gray to reddish-brown fading to yellowish, often 

 obscurely spotted, especially at the center; margin sterile, pro- 

 jecting, incurved and somewhat appendiculate when young; 

 context thick, compact, elastic, pale-yellow next to the tubes, 

 white above, unchanging when wounded, taste mild, somewhat 

 mucilaginous; tubes short, less than 5 mm., adnate, subdecurrent, 

 plane in mass, pale-yellow to dirty-yellowish, unchanging when 

 wounded, mouths simple, subcircular, irregular, edges rather 

 thick, flecked with pinkish-brown glandules; spores fusiform, 



