368 



MUSHROOMS, EDIBLE AND OTHERWISE 



Boletus subluteus. Pk. 



The Yellow Boletus. Edible. 



Subluteus is from sub, under, nearly ; luteus, yellow. 



Pileus is two to three inches broad, convex, becoming plane, quite viscid 



when moist, dull yellowish to reddish brown, frequently more or less streaked. 



The flesh is whitish or dull yellow. 



The tube surface is plane or convex, the tubes set squarely against the stem, 



being small, nearly round, yellowish or ochraceous, becoming darker in age. 



The stem is rather long, nearly equal, about the color of the cap, dotted 



both above the ring and below it ; the ring is membranaceous, quite variable and 



persistent, usually collapsing as a narrow ring on the stem. The spores are 



ochraceous-brown, oblong or elliptical, 8-10x4-5. 



Prof. Atkinson has made a careful study of both the American and the 



European plants called in this country B. luteus and B. subluteus, and has come 



to the conclusion that they 

 should all be called B. 

 luteus. In distinguishing 

 the two we usually say 

 those having much gluten 

 and dotted above the ring 

 are B. luteus, and those 

 dotted both above and be- 

 low the ring are B. sub- 

 luteus. The specimens in 

 Figure 297 were collected 

 at the State Farm at Lan- 

 caster, Ohio, and photo- 

 graphed by Dr. Kellerman. 

 They are found in July and 

 August. 



Ficure 298. Boletus parasiticus. 



Boletus parasiticus. Bull. 



Parasiticus means a par- 

 asite: so called because it 

 grows on a Scleroderma. 

 It is a small plant and 

 quite rare. 



The pileus is one to two 

 inches broad, convex, or 

 nearly plane, dry, silky, 



