B. fla'vilS With. Pileus convex, compact, covered with a brownish Boletus, 

 separating gluten, pale-yellow. Flesh pale-yellow. Tubes large, angu- 

 lar, adnate, yellow. Stem yellow, becoming brownish, reticulated 

 above the membranous fugacious dirty yellowish annulus. Spores 8 

 IOX3-4/X. 



Pileus 2-5 in. broad. Stem 2-3 in. long, 6-10 lines thick. 



Woods. Minnesota, Johnson; Wisconsin, Bundy. 



This is apparently a rare species in this country. I have not seen it. 

 It is said to resemble B. luteus, from which it is separated by the large 

 angular mouths of the tubes. In British Fungi the spores are described 

 as "spindle-shaped, yellowish-brown;" in Sylloge, as "ovoid-oblong, 

 acute at the base, granulose, pale ochraceous." Peck, Boleti of the 

 U. S. 



B. fistulo'silS Pk. Pileus convex, viscid, glabrous, yellow, the 

 margin at first incurved or involute. Flesh yellow. Tubes plane or 

 subventricose, medium size, round with thin walls, adnate or sometimes 

 depressed around the stem, yellow. Stem rather slender, subequal, 

 viscid, glabrous, hollow, yellow, with a white mycelioid tomentum at 

 the base. Spores elliptical, 13x6^. 



Pileus about i in. broad. Stem 2-'4 in. long, about 3 lines thick. 



Grassy woods. Auburn, Ala. July. Underwood. 



A small but pretty species of a yellow color throughout. It is re- 

 markable for its hollow stem, which is suggestive of the specific name. 

 It is referable to the tribe Viscipelles. Pefk, Bull. Torrey Bot. Club, 

 Vol. 24, No. 3. 



B. sphseros'porus Pk. globose-spored. (Bulletin Torrey Botanical 

 Club, Vol. XII.) Pileus at first hemispherical, then convex, glabrous, 

 viscid, creamy-yellow, becoming reddish-brown or chestnut color with 

 age. Flesh pale yellowish-brown. Tubes adnate or slightly decur- 

 rent, large, angular, pale-yellow, becoming brown, sometimes tinged 

 with green. Stem stout, equal, even or slightly reticulated at the top, 

 the membranous anmilus persistent, sometimes partly adhering to the 

 margin of the pileus. Spores globose or broadly elliptical, 8~9/* long. 



PileilS 3-8 in. broad. Stem 1-3 in. long, 6-12 lines thick. 



Low ravines and sandy places. Wisconsin, Trelease; Iowa, Me Bride. 



The spores easily serve to distinguish this species from its allies. The 



411 



