THE POLYPORACEAE OF WISCONSIN. 139 



then light-yellow arcuate-adnate or slightly depressed around the stem, 

 the mouths small; stem enlarged toward the base, striate at the apex, 

 yellowish or pale cinnamon ; spores 10 microns long, 4 microns broad. 



Pileus 6 to 12 cm. broad; stem 2.5 to 5 cm. long, 6 to 11 mm. thick. 

 Borders of the woods. 



"In drying, the margin of the pileus has a tendency to curve up- 

 wards. The hairy tufts or squamules are very 'minute, and sometimes 

 appear almost granular. The species seems intermediate between B. 

 variegatus and B. sulphur eus; with the latter the variety (auricolor) 

 connects it (Peck, 21, 2, 8, p. 115). 



Not common. One specimen was collected near Parfrey's Glen. Its 

 pileus is 4 cm. in diameter; its stipe about 6 cm. long and 4 mm. thick. 

 The pileus in the dry state was of a brick-red color, rough tomentose. 

 The pileus thin with the acute margin curved up. The pores are pale 

 yellowish, small, adnate. 



K. Pulverulenti. Pileus clotlied with a yellow dust or a yellow put- 

 verulent tomentum. Stem more or less purverv- 

 lent, neither bulbous nor reticulated. 



Boletus hemichrysus B. & C. 



Pileus convex, at length plane or irregularly depressed, floccose- 

 squamulose, covered with a yellow powder, sometimes rimose, bright 

 golden-yellow, flesh thick, yellow; tubes adnate or decurrent, yellow, 

 becoming reddish-brown, the mouths large, angular; stem short, irreg- 

 ular, narrowed below, sprinkled with a yellow dust, yellowish tinged 

 with red ; mycelium yellow ; spores oblong, minute, dingy-ochraceous. 



Var. mutabilis. Flesh slightly changing to blue where wounded ; stem 

 reddish, yellow within, sometimes excentric ; spores oblong elliptical 7.5 

 to 9 microns long, 3.5 to 4 microns broad. 



"Pileus 3.5 to 7 cm. broad; stem about 6.5 cm. long, 6 to 12 mm. 

 thick. The species is remarkable for its habit which is lignicolous" 

 (Peck, 21,2, 8, p. 103). 



Several specimens of this species were collected at Shanagolden on an 

 uprooted white pine stump, and several were found on the root of a 

 living white pine at Bangor. The Shanagolden specimens were clearly 

 of the variety mutabilis. 



The largest specimen measured 10 cm. in diameter; the stipe 7 cm. 

 long and 1.2 cm. thick. The pilei are irregular, eccentrically stiped, 

 dry, covered with an "Indian-yellow" powder. The cuticle is velvety 

 and separable, the margin appendiculate in some of them. 



