THE POLYPORACEAE OF WISCONSIN. 85 



I have compared our specimens with no. 302, Sydow's Mycotheca 

 germanica ; which with no. 801 North American Fungi ; Polyporus ap- 

 planatus (Pers.) from West Chester, Pa., agrees well with our forms and 

 with No. 339, P. S. F., F. applanatus (Pers.), Stanford University, 

 Cal., (identified by Peck). In this latter specimen the tubes are long 

 and the strata hardly visible, like the tubes in F. fomentarius, but the 

 spores agree with those of our forms. No. 114, C. A. F., Forties ap- 

 planatus (Pers.), from Castillo, Nicaragua, has a thinner cuticle and 

 softer substance than our forms, except some of our younger specimens 

 which agree quite well with these southern types. Specimens from 

 Berlin, Germany, from the Palmhouse in the Botanic Garden, deter- 

 mined by Magnus, agree in every other respect except that they have 

 a whitish instead of a dark ferruginous hymenophore. 

 Syn. : Elfvingia megaloma (Lev.) Murr. ; 19, 30, p. 300. 



Forties megaloma (Lev.) Cke. ; 11, p. 18. 1885. 



Fomes leucophaeus Mont. ; 26, VI, p. 173. 



Fomes officinalis (Vill.) (Plate X, fig. 33). 



Hoof -shaped thick; surface nodulose, corky to fleshy, when fresh 

 soft but tough when dry ; porous, friable, with yellow and brown zones 

 and concentric furrows, glabrous, yellowish white, with hard rimose 

 rind ; pores delicate, short yellowish, when older brownish. 



On Larch. 



A gigantic specimen of this fungus is preserved in the University 

 herbarium. Its origin is unknown; but it is probably from the north- 

 ern part of the state. It measures about 65 cm. in height and 105 cm. 

 in circumference at its thickest part. It shows about 70 strata. 



The fungus has been reported by various collectors as found on larch 

 in the northern part of the state and a doubtful specimen is reported 

 by Dodge from Algoma. 



Fomes lucidus (Leys.) Fries (Plate IX, fig. 32). 



Horizontal, flabelliform or subreniform, laterally stipitate, pileus 

 5 — 15 cm. across ; corky, then hard and woody, sulcato-rugose, blood-red 

 with a chestnut tinge, polished, shining ; pores 6 mm. to 12 mm. long, 

 minute, whitish then cinnamon; stem variable in length, rugose, col- 

 ored and polished like the pileus ; spores 7 by 5 microns, brown. 



