44 THE POLYPORACEAE OF WISCONSIN. 



color, the soft corky substance, the equal to medium-sized pores, and 

 its habitat which is almost invariably hemlock. 

 Syn. Boletus annulatus (Schaeff.) ; 27, Taf. 106. 



Trametes pini (Thore) Fries (Plate IV, fig. 16). 



Pileus pulvinate or bracket-shaped, sometimes resupinate, 8 — 16 cm. 

 broad, very hard, of corky-woody consistence, concentrically sulcate 

 above, rimose-scrupose, rusty-brown becoming black, within yellowish- 

 brown. Pores large, roundish or oblong, reddish-yellow. Spores 

 broadly oval, only more rarely globose, 5 — 6 microns long, 4 — 5 microns 

 broad. 



On living trunks, especially of pine, but also on other conifers. 



Massee says that the flesh is thick behind, that the pores are ^4 inch 

 deep the first year, but that the species is perennial and eventually the 

 strata collectively become 1 inch or more thick. He desciibes them 

 also as having a slight but pleasant odor. 



Specimens submitted to Patouillard were identified by him as Poly- 

 porus piceinus Peck. Pfenning, to whom specimens were also sub- 

 mitted, expresses the opinion that P. piceinus and Trametes abietis are 

 the same as T. pini. Polyporus piceinus (22, 42, p. 25) is described 

 by Peck as follows: "Pileus 1-2 inches broad, thin subcorky, sessile, 

 often concrescent, and imbricated, sometimes resupinate or effuso-re- 

 flexed, tomentose, concentrically sulcate, and adorned with interven- 

 ing elevated tomentose lines or narrow zones, tawny-brown or subspa- 

 diceous, the thin margin at first golden-yellow, soon tawny, then con- 

 colorous; the hymenium plane or concave, tawny-cinnamon, the pores 

 minute, subrotund, long, the dissepiments thin but entire; spores mi- 

 nute, subglobose, 4 microns broad." 



In further notes on the same species, Peck says that P. piceinus 

 grows on spruce only and that its color resembles that of Lenzites 

 sepiaria. "T. pini," he says, "is a little paler or more tawny." He 

 notes further that it revives the second year and resembles Fomes pecti- 

 natus, but that it belongs rather to the Polysticti. 



Our specimens were collected in Milwaukee, La Crosse, Oneida, 

 Vilas, Forest and Ashland Counties on white and red pine, living and 

 dead, on tamarack, living and dead, on dead spruce and dead hem- 

 lock. The species is most abundant on tamarack, living and dead, in 

 the northern part of the state and on living white pine. In the pines 

 it produces the well known "dry or ring-rot." Hartig calls it "red 

 rot" (Rothfaule). 



