THE POLYPORAGEAE OF WISCONSIN. 119 



The largest was 8 cm. in diameter; the stipe 7 cm. long and 1 cm. 

 thick. The pileus when young is nearly conical, but becomes more 

 flattened with age; the color is dark red at first, becoming areolate 

 showing a grayish or yellowish tomentum in the cracks; the margin is 

 thin, sometimes appendiculate. The pores are large, irregular yellow, 

 adnate ; spores rust-color. 



The veil is flocculose, whitish or grayish, leaving a more or less per- 

 sistent grayish-white annulus. The stem tapers upward, and is gray 

 with red-fibrillose scales, tough. The flesh is yellowish, tasteless and 

 with out any changes in color. 



Syn. : Boletus Spraguei B. & C. ; 11, 1, p. 35. 



Boletinus decipiens. Peck. 



Pileus dry, minutely silky, whitish-yellow or pale buff, 8 mm. 

 thick; hymenium plane or somewhat concave, yellow, consisting 

 of large, unequal flexuous radiating tubes resembling multiseptate la- 

 mellae; stem equal, solid but spongy; veil floccose, evanescent, adhering 

 for a time to the margin of the pileus; spores rather minute, oblong, 

 ochraeeo-ferruginous, 7.6 to 10 microns long, 3.5 to 3.9 microns broad. 



Pileus 5 cm. broad ; stem 5 to 7 cm. long, 6 to 8.4 mm. thick. 



Collected near Lake Mills in November. I have not seen fresh spe- 

 cimens. The dried ones are of a dark brown color above and below. 

 The stem is somewhat flexuous and in some cases excentric. The dis- 

 tinguishing feature seems to be the large radiating pores which are 

 scarcely separable from the pileus. The spores are of a brownish rust 

 color. 



There seems to be considerable variation in the color of the pileus as 

 well as in the size of the pores. One specimen has a sort of rose color, 

 and several others have a shining almost tan-colored pileus. The pores 

 in the latter are rich cinnamon in color and quite small. 



Boletinus porosus (Berk.) Peck. 



Pileus fleshy, viscid when moist, shining, reddish-brown, flesh 6.3 to 

 19 mm. thick, the margin thin and even ; hymenium porous, yellow, 

 formed by radiating lamellae one to two mm. distant, branching and 

 connected by numerous irregular veins of less prominence and forming 

 large angular pores ; stem lateral, tough, diffused into the pileus, reticu- 

 lated at the top by the decurrent walls of the tubes, colored like the 

 pileus; spores semiovate. Pileus 5 to 10 cm. broad ; stem 12.6 to 35 mm. 

 long, 8.4 to 12.5 mm. thick. 



