364 Mirrh.l: Polyporaceae of North America 



Subfamily 2. FOMITEAE 



Hymenophore large, woody, perennial, rarely small or annual ; 

 surface anoderm or encrusted, usually sulcate, sometimes varnished : 

 context punky or woody, variously colored ; tubes cylindrical, 

 usually thick-walled : spores rounded, smooth or verrucose, hy- 

 aline or brown, cystidia frequently present, surface conidia-bear- 

 ing in a few species : stipe rarely present, the hymenophore usu- 

 ally being sufficiently elevated by its host. 



Annual forms and species in a few genera connect this group 

 with the Polyporeae ; while the tendency at times to produce a 

 daedaleoid hymenium, shown especially in Porodaedalea, connects 

 it with the Agariceae. 



Synopsis of the Fomiteae with brown context 



Surface of the hymenophore covered with reddish-brown varnish, 



context corky. I. Ganoderma. 



Surface of the hymenophore not as above. 



Context olivaceous. 2. Fomitella. 



Context brown or dark-red. 



Hymenophore plainly stipitate, simple. 3. Amauroderma. 



Hymenophore subsessile, cespitose, arising from a 



common trunk or tubercle. 4. Globifotne*. 



Hymenophore truly sessile, dimidiate or ungulate, simple 

 or imbricate. 



Hymenium labyrinthiform, varying to porose, tubes 



not distinctly stratified. . 5. Porodaedalea. 



Hymenium porose, tubes distinctly stratified. 



Pileus covered with a horny crust, context 



punky. 6. Elfvingia. 



Pileus not covered with a horny crust, or, if 



encrusted, context woody. "j . Pyi'opolyporus. 



Context dark-purple or black. 8. Nigrofomes. 



I. GANODERMA Karst. Rev. Myc. 3: 17. 1881 



Type : Ganoderma flabelliforme (Scop.) Murr. 

 Placodes Quel. Ench. Fung. 170. 1886. 



Type : Ganoderma flabelliforme (Scop.) Murr. 



Hymenophore large, sessile or stipitate, perennial or annual, 

 epixylous ; surface sulcate, covered with reddish-brown varnish: 

 context punky, brown, rarely pallid ; tubes cylindrical, concol- 

 orous : spores ovoid, brown. 



Species : G. Tsugae Murr., G. flabelliforme (Scop.) Murr., G. 

 sessile Murr., G. parvulum Murr., G. Oerstedii (Fr.) Murr., G. sona- 

 tina Murr., G. sulcatum Murr., G. nutans (Fr.) Pat. [see Bull. 

 Torrey Club 29 : 599-608. 1902]. 



