8 Cincinnati Society of Katiiral History. 



In low, damp places in woods, in summer; rare. Pileus 3-4 in. 

 broad, stipe 3-4 in. long, and ^ f of an inch thick. I found my speci- 

 mens in very dry weather, and they were quite firm and not infested 

 by the larvae of insects. In the 3'ounger specimens there is some red 

 on the stipe and within; the pileus becomes thick and the pores change 

 to blackish as the plant grows old. ' 



Series II. — Tephroleuci. 



Tubules at first white or gray. 



D. Changing to broion. 



9. B. sTROBiLACEUS, Scop. — Blackish-umbcr. Pileus pulvinate, im- 

 bricated with thick floccose scales. Stipe equal, veiled, sulcate at the 

 apex. Tubules adnate; the pores large, angular, whitish-brown. 

 Spores blackish-brown, nearly globose, .010 — .013 mm. in diameter. 



On the ground in dry woods, in summer; common. Pileus 2-4 in. 

 broad, stipe 3-4 in. long, and ^-f of an inch thick. In this species the 

 scales are imbricate, and the tubules are adnate by their whole length. 

 The flesh when cut or broken becomes reddish or blackish. 



10. B. PLOCCOPDS, Vahl. — Cinereous, at length blackish. Pileus pul- 

 vinate, soft, covered with an areolate-fasciculate, scalj'-squarrose to- 

 mentura; veil silky thick, annular appendiculate. Stipe stout, umber- 

 tomentose below, lacunose above. Tubules abbreviated behind; the 

 pores large, white gray. Spores blackish, nearl}'^ globose, .009 — .010 

 mm. in diameter. 



On the ground in dry woods, in summer; common. Pileus 3-5 in. 

 broad, the stipe 4-5 in. long, and | 1 in. thick. This species is distin- 

 guished by the tomentum raised into thick, erect, pointed tufts, and 

 by the tubules being depressed around the stipe. These black Boleti 

 are abundant in our woods, and probably there is hardly enough dif- 

 ference between them to warrant two species. They seem to be scarce 

 in Europe; they are tiie Strobilomyces of Berkele3\ 



liJ. Changing to sordid. 



11. B. SCABER, Fr. — Pileus pulvinate, glabrous, viscid when wet, at 

 length rugulose or rivulose; the margin at first curtained. Stipe solid 

 tapering upward, louiili with (ibrous scales. Tul>ules free, convex, 

 white then sordid; tije pores minute, round. Spores pale brown, fusi- 

 form. .014— .O15X.O055 mm. 



In hilly woods in summer; rare. Pileus 3-5 in. broad, the stipe 3 5 

 in. high, and ^-1 in. thick. The few depauperate specimens 1 have 



