THE POLYPORACEAE OF WISCONSIN. H3 



Common on pine, spruce and hemlock. Localities : Star Lake, Shana- 

 golden, and Bangor. The specimens from Bangor were taken in Aug- 

 ust from the roots of a living white pine ; the rest from stumps or dead 

 trunks. This species attacks the living trees through the roots, spread- 

 ing upwards for a short distance. It produces a brown rot, not unlike 

 that produced by Fomes pinicola, making the wood very brittle, and ul- 

 timately killing the tree. 



The largest specimen found had a diameter of about 30 cm., the flesh 

 being about 3 cm. thick near the center. The stem is short and thick. 



The pileus is rough above, dark brown when dry, lighter when fresh. 

 The center is usually somewhat depressed. The flesh is of a bright 

 brown, soft, fibrous and very brittle. The pores are large, yellowish- 

 brown, decurrent and irregular. When freshly growing the pores are 

 quite delicate and stain darker where bruised and touched. Wood con- 

 taining fresh mycelium of this species is phosphorescent. 



Syn: Polystictus Schweinitzii (Fr.) Karst. ; 13, 3, p. 18. 

 Polyporus Jiispidoides Peck pr. p.; 22, 33, p. 21. 

 Bomellia sistotremoides (Alb. et Schw.) Murr. ; 19, 31, p. 339. 



Polyporus flavovirens B. & Rav. 



Pileus soft, irregular, cushion-shaped or depressed, finely tomentose, 

 yellowish-green ; stipe pale, nearly the same color, thick. Pores irregu- 

 lar, dissepiments thin, yellow. Pileus 8 to 10 cm. broad, stipe 5 cm 

 long, 12 mm. thick. Pores 0.5 mm. broad. 



In Grevillea vol. 1, p. 38, the same species is described as follows: 

 "Pileus irregularly lobed, subreniform, subtomentose dirty yellow 

 marked with yellowish green zones. Context white. Stipe central and 

 lateral, same color as pileus. Hymenium yellowish-green, deeply decur- 

 rent. Pores decurrent angular, irregular, lacerate when old. Related 

 to P. rufescens. Like P. cristatus." 



Most of our specimens came from Blue Mounds. A few were found 

 on Cradle Bluff, Sparta and at Milwaukee. These agree best with the 

 second description given above. Their pores are much smaller than 

 those in the Blue Mounds specimens, and longer. 



The largest of our specimens measured about 10 cm. in diameter, 

 scarcely 1 cm. thick. The stipe is 6 cm. long and 1 cm. thick. 



When fresh the color of the pileus varies from creamy-yellow to 

 greenish-yellow, and they often seem almost glabrous. The margin is 

 very irregular and lobed, curling downwards on drying. The zones 

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