Polyporaceae 



Boletus, clings to it with hope. Even after tasting, it is thrown away with 

 regret. It is not poisonous, but a small piece of one will embitter a 

 whole dish. Mcllvaine, Bull. Phila. Myc. Center. July, 



B. nigrel'lus Pk. blackish. PileilS broadly convex or nearly plane, 

 dry, subglabrous, blackish. Flesh soft, white, unchangeable. Tubes 

 plane or convex, adnate, sometimes slightly depressed around the stem, 

 their mouths small, subrotund, whitish becoming flesh-colored, slowly 

 changing to brown or blackish where wounded. Stem equal, shert, 

 even, colored like or a little paler than the pileus. Spores dull flesh- 

 colored, IO I2X5-6/A. 



Pileus 3-6 in. broad. Stem 1.5-2.5 in. long, 6-12 lines thick. 



Woods and copses. New York, Peck. 



The blackish color of the pileus and stem distinguishes this species. 

 From Boletus alboater Schw., the adnate, flesh-colored tubes will sepa- 

 rate it. The surface of the pileus sometimes becomes cracked in areas, 

 Peck, Boleti of the U. S. 



Mt. Gretna, Pa., August, 1898. Mcllvaine. 



Another distinguishing mark from B. alboater is the velvety pileus of 

 the latter. B. nigrellus is mild in taste and smell and an excellent 

 species for the table. 



B. eccen'triaus Pk. eccentric. (Plate CXVI, fig. I, p. 420.) 

 Pileus thick, firm, convex, irregular, glabrous, more or less lobed or 

 wavy on the involute margin, gray or yellowish-gray. Flesh white, 

 close-grained, elastic, unchangeable, taste and odor farinaceous. Tubes 

 convex, depressed around the stem, not reaching the margin of the pi- 

 leus, somewhat uneven and pitted on the surface, yellowish-brown, the 

 mouths subangular, at first concolorous, becoming reddish or reddish- 

 purple. Stem eccentric, tapering downward, solid, uneven with short 

 irregular shallow grooves or obscure reticulations, tinged with red at the 

 top, grayish below, tinged with red or purple within at the base. 



Pileus 5-10 cm. broad. Stem 4-5 cm, long, 3-4 cm. thick at the top. 



Sandy soil in grassy places in woods. Mt. Gretna, Pa. August and 

 September. 



The species is well marked by its eccentric stem, thick irregular pileus 

 and the reddish or reddish-purple mouths of the mature tubes. Mr. 



470 



