46 THE POLYPORACEAE OF WISCONSIN. 



2, Pale yellow, hard, dry p. xantha 



2. Violet, thin P. violacea 



2. Purple with white margin p. purpurea 



2. Ferruginous with white margin p. marginellus 



2. Purple tubes long p. crocipora 



2. White becoming yellow and fuscous p. Andersoni 



2. Brown, soft P. contigua 



2. Brown, harder : P. ferruginosa 



2. Purplish brown woody p. laevigata 



3. Fleshy, somewhat moist 4 



3. Flesh more or less dry 5 



4. Very thin, white p. Gordoniensis 



4. Substance of radiate flocculose strands P. radula 



4. Soft, pores small, thin p. mollusca 



4. Dry, thin, pores medium, oblique P. viridans 



4. Pores lengthened, torn p. subacida 



4. Pores very long, forming almost the entire thickness of the plant 



P. medulla-panis 



4. Pores sinuous p. sinuosa 



4. Pores minute, pale yellow or pinkish P. attenuata 



4. Pores minute, yellowish or tawny P. crassa 



5. Pores small, blunt P. vulgaris 



5. Pores larger, torn P. corticola 



6. Pores large, shallow P. vaporaria 



5. Pores small, short, stratified P. obducens 



5. Pores minute irregular P. subfusco-flavida 



5. Pores minute, regular, angular P. pulchella 



Poria terrestris (D. C.) Fries. 



Effused, very thin, composed of delicate byssoid hyphae, white, 

 evanescent; pores central, very minute, white, then rufescent. 



Only one specimen has been found in the state. It was growing on 

 the ground in the greenhouse at the University of Wisconsin in De- 

 cember 1899. It was thin, whitish and moist and measured about 



3 cm. in length, 2 cm. in width and scarcely 1 mm. in thickness. It 

 was iregular in outline. The margin was somewhat fringed, and 

 the surface was uneven. The pores in the center, were small, irregu- 

 lar, and shallow, becoming a faint reddish-brown. The plant was held 

 to the ground by rhizomorphous strands which were about 8 9 cm. 

 long and from 1 2 mm. thick. They penetrated the ground in vari- 

 ous directions for their full length. The spores are subglobose about 



4 microns by 3.5 microns. 



Syn.; Polyporus terrestris (D. C.) Fries, 28, 1 p. 410; 8, p. 576. 



