THE POLYPORACEAE OF WISCONSIN. H5 



Polyporus radicatus Schw. (Plate XV, fig. 54). 



Pileus fleshy-tough, pulvinate, depressed, sooty-pale, sub-tomen- 

 tose. Stipe excentric, long, tapering downward, rooting, black below. 

 Pores somewhat decurrent, very large, obtuse, equal white. 



In his notes on this species, Morgan (18, VIII, p. 94) says: "I find 

 this plant as Berkeley says, of various sizes, from the small plant which 

 Schweinitz described to five inches or more across with the stipe six 

 inches or more in length. The long tapering stipe penetrates the earth 

 several inches the tip always being attached to some portion of an old 

 root. The pileus is brown or blackish and more or less tomentose ; the 

 upper part of the stipe is colored like the pileus, whitish at the top ; the 

 lower rooting portion is black and more or less crooked or deformed. 

 The pores are very large averaging .65 mm. in diameter. P. Morgani 

 Frost appears to me to be this plant." 



Localities : Madison, Blue Mounds, Milwaukee, White Fish Bay. The 

 largest specimen found measures 30 cm. in diameter, the pileus being 

 4 to 5 cm. in thickness. The stem is 14 cm. long, the thickest portion 

 being 6 cm. in diameter. The black radicating part is 7 cm. long and 

 tapers irregularly downwards. The pores are angular nearly 1 mm. in 

 diameter, and 3 to 4 mm. long, turning brown when bruised. The pil- 

 eus is a bright red-brown in color, finely scaly or subsquamulose. The 

 margin is thin, recurved. The flesh is white with rather acrid taste. 

 Its weight when fresh was four and one-half pounds. This is the speci- 

 men figured. 



The species may be easily recognized by the black radicating stipe. 



Syn. : Polyporellus brumalis (Pers.) Karst.; 19, 31, p. 33. 

 Polyporus polyporus (Retz.) Murr. ; 19, 31, p. 33. 



Polyporus subradicatus (Murr.) (Plate XIV, fig. 53). 



A rather large thin plant with light-brown, almost glabrous, surface, 

 small white serrated tubes and short black stipe. Pileus irregular in 

 outline, convex to plane, 12 by 9 by 0.5 cm. ; surface fibrillose, drab- 

 colored to isabelline; margin very thin, inflexed when young, irregu- 

 larly undulate at maturity: context fleshy-tough, 1 to 7 mm. thick, 

 pure milk-white even when dry; tubes mere areoles at first, short and 

 small at maturity, scarcely 1 mm. in length, 3 to 4 to a mm., decurreut 

 to the blackened part of the stipe, white, yellowish when dry, mouths 

 polygonal, regular, at length much elongated by a confluence or other- 

 wise irregular, edges thin, toothed or fimbriate when mature: spores 



