THE POLYPOBAOEAE OF WiaCONSIN. 143 



decurrent, pale-yellow becoming dingy ochraceous; stem equal, stout, 

 glandular-dotted, yellow without and within ; spores oblong or subfusi- 

 form, ochraceo-ferruginous. 7.6 to 10 microns long, 4 microns broad. 



Pileus 5 to 10 cm. broad ; stem 3.5 to 6 cm. long, 8 to 12.5 mm. thick. 

 Thin woods and open places. 



Peck (21, 2, 8, p. 94) says further: — "This plant might almost be 

 considered a stout variety of the preceding [B. americanus], but in- 

 addition to its thicker pileus and stouter stem, it has smaller tubes of a 

 clearer yellow color and the exuding drops are yellow, not whitish as 

 in that species. In habit it appears more like B. granulatus, from which 

 it is distinct in color." 



Localities : Sparta, on the side of a sandy bluff ; Crandon, in mixed 

 woods. The largest one was 6 cm. in diameter; the stipe 5 em. long 

 and 1 cm. thick. The pileus was yellow, viscid, with a few red fibrils ; 

 the pores were adnate to subdecurrent, small, angular compound, yel- 

 low. The stem was straight, punctate, yellow. The flesh yellowish. 

 The tubes slowly change to brownish when bruised. The drops of fluid 

 exuded are pale dirty-yellow. 



In my opinion this species is closely related not only to B. americanus 

 but also to B. punctipes. The brownish stem and paler color of the pi- 

 leus of the latter distinguish it from the species. 



Boletus Americanus Peck (Plate XVII, fig. 60). 



Pileus thin, convex or nearly plane, sometimes umbonate, soft, very 

 viscid or glutinous when moist, slightly tomentose on the margin when 

 young, soon glabrous or the margin, sometimes remaining squamose, 

 rarely squamose-spotted from the drying gluten, yeUow, becoming 

 dingy or less bright red, flesh pale-yellow, less clear or pinkish-gray on 

 exposure to the air; tubes plane or convex, adnate, rather lai'ge, 

 angular, pale-yellow, becoming sordid ochraceous; stem slender, 

 equal or slightly tapering upwards; firm not at all annulate, 

 yellow, often pallid or brownish toward the base, marked with numer- 

 ous brown or reddish-brown persistent glandular dots, yellow within; 

 spores oblong or subfusiform, ochraceo-ferruginous, 7.6 to 11.4 microns 

 long, 4 to 5 microns broad. 



Pileus 2.5 to 8 cm. broad; stem 3 to 6.5 cm. long, 4 mm. thick. 

 Woods, swamps and open places, especially under or near pine trees. 



Quite common in northern woods — sometimes under hemlock, some- 

 times in open sandy places. Very abundant on the east and west 

 shore of Sandy Lake near Crandon, growing with B. suiluteus, B. Clin- 



