608 Murrill: Polyporaceae of North America 



Polyporus sulphureus Fr. Syst. i: 357. 1821. 

 Polypilus sulphureus Karst. Rev. Myc. 3: 17. 1881. 

 Polypilus speciosus Murrill, Jour. Myc. 9: 93. 1903. 



This species is widely and abundantly distributed both in 

 Europe and America and is exceedingly well known on account 

 of its size, conspicuous habitat, and bright attractive coloring. 

 The mycelium spreads widely through the trunks of deciduous, 

 and even evergreen, trees, causing serious damage, while the 

 sporophores appear annually in caespitose-multiplex masses at 

 knot-holes on the affected parts. The various names under which 

 the plant has been known all refer to the bright color of these 

 sporophores, which are usually reddish-yellow above and sulfur- 

 yellow below, fading to almost white with age. A few of the 

 numerous collections in which this plant figures are noted here : 

 Sweden, Murrill; Maine, Miss White ; Connecticut, Miss White; 

 Delaware, Commons; New York, Peck & Parle; Pennsylvania, 

 Everhart & Haines ; New Jersey, Ellis, Murrill ; Alabama, Earlc ; 

 Louisiana, Langlois ; Mexico, Smith. 



Trichaptum gen. nov. 



Hymenophore annual, epixylous, sessile, dimidiate ; context 

 brown, firm and leathery below, very loosely fibrous and darker 

 above ; tubes short, thin-walled, mouths polygonal, becoming 

 labyrinthiform ; spores smooth, hyaline. 



The type of this genus is Polyporus trichomallus Perk. & 



Mont. (Ann. Sci. Nat. III. II : 238. 1849), described from 



Guiana. It resembles the old-world genus Funalia erected by 



Patouillard in 1900 with P. mons -veneris Jungh., P. leoninus Kl. 



and P.funalis Fr. as typical species and /-*. trichomallus Perk. & 



Mont, in a subsection ; but it may be easily distinguished from 



Funalia by its darker context and daedaleoid hymenium. While 



splitting often occurs, rendering the hymenium irpiciform, the 



splitting is not so radical as in Funalia. The name chosen refers 



to the loosely woven context. 



Trichaptum trichomallum (Perk. & Mont.) 

 Polyporus trichomallus Berk. <x Mont. Ann. Sci. Nat. III. II : 



238. 1849. 

 Funalia trichomalla Pat. Tax. Hymen. 95. 1900. 



