AMERICAN BOLETES 29 



5. SUILLELLUS MORRISII (Peck) Murrill 



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, inflcxed, 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 

 X 4-5 M; 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, 



