BOLETI OF THE UNITED STATES ~— I4!i 
bulbous scarcely reticulated stem, is regarded as a variety 
of this species. The red-stemmed Boletus, B. exythropus 
Pers., is also indicated as a variety of it by Fries. It is 
smaller than B. Zurzdus, has a brown or reddish-brown pileus 
and a slender cylindrical stem, not reticulated, but dotted 
with squamules. It has been reported from California by 
Harkness and Moore. 
Boletus purpureus Fr. 
PurRPLE BOLETUS 
Hym. Eur. p. 511. Syl. Fung. Vol. VI, p. 35 
Pileus convex, opaque, dry, somewhat velvety, purplish-red, 
flesh in the young plant only becoming blue, then dark-yel- 
low; tubes nearly free, yellow or greenish-yellow, their 
mouths minute, purple-orange, changing to blue where 
wounded; stem stout, firm, adorned with purple veins or 
dots, sometimes reticulated at the apex only, yellow, reddish 
within, especially at the base; spores greenish-brown, .0004 
to .0005 in. long, .0002 to .00025 broad. 
Pileus 2 to 4 in. broad; stem 2 to 4 in. long, 6 to 8 lines 
thick. 
Woods. North Carolina, Curtes. New York, Peck. 
Minnesota, /ohkuson. 
The species is easily recognized by the velvety appearance 
of the pileus. The color sometimes fades to yellowish on 
the margin. The stem is sometimes merely scurfy. 
Boletus vermiculosus Pr. 
Wormy BoLetus 
Rep. 23, p. 130 
Pileus broadly convex, thick, firm, dry, glabrous or very 
minutely tomentose, brown, yellowish-brown or grayish- 
brown, sometimes tinged with red, flesh white or whitish, 
