MUKRILL : POLYPORACEAE OF NORTH AMERICA 191 



Heterobasidion Bref. Unters. 8 : 154. 1889. (Not Heterobasidium 



Mass. 1888.) Type: Polyponts annosus Fr. 



Hymenophore sessile, ungulate or applanate, epixylous ; sur- 

 face anoderm or encrusted, sulcate, rarely zonate ; context white 

 or flesh-colored, woody, rarely punky ; tubes cylindrical, con- 

 colorous, usually thick-walled, stratose; pores smooth, hyaline. 



Species : F. roseus (Alb. & Schw.) Cooke, F. annosus (Fr.) 

 Cooke, F. ungulatus (Schaeff.) Sacc, F. Ellisianus Anders., F. 

 fraxinophilus (Peck) Sacc, F. ligneus (Berk.) Cooke, F. stipitatus 

 Murr., F. perpusillus (Pers.) Cooke, F. scutellatus (Schw.) Cooke, 

 F. Lands (Jacq.) Murr., F. populinus (Schum.) Cooke, F. Meliae 

 (Underw.) Murr., F. rubritinctus Murr., F. geotropus Cooke. [See 

 Bull. Torrey Club 30 : 225-232. 1903.] 



An original specimen of Persoon's Poly poms perpusillus, pub- 

 lished by Leveille in 1844, shows this plant to be the same as 

 Trametes ohiensis Berk., published in 1872. Persoon's name, 

 therefore, must be adopted instead of the one under which the 

 species is commonly known. Considering the very small size of 

 the species, the older name seems exceedingly appropriate. 



To the above list of species should be added Fomes Auberianus 

 (Polyponts Auberianus Mont. PI. Cell. Cuba 397. 1842), described 

 from Cuban plants collected by Auber. It is a large and striking 

 species found on wounded trunks or dead logs of hardwood trees 

 throughout tropical America. Material is at hand from Cuba, 

 Earle, Earle & Wilson 253, Earle & Murrill 4 ; Porto Rico, Wil- 

 son 12; St. Kitts, Britton & Cowell 328 ; Martinique, Duss ; 

 Mexico, Smith. 



Subfamily 3. AGARICEAE 



Synopsis of the Agariceae with white context 



Surface glabrous, hymenium usually labyrinthiform. I. Agaricus. 



Surface pubescent or hirsute. 



Hymenium at first labyrinthiform, soon becoming irpiciform. 2. Cerrena. 



Hymenium lamellate, not becoming irpiciform. 3. Lenzites. 



i. AGARICUS (Dill.) L. Sp. PI. 1176. 1753 



Type : Agaricus qucrcinus L. 



Striglia Adans. Fam. 2 : 10. 1763. Type: Agaricus qucrcinus \^. 



Daedalea Pers. Syn. Fung. 499. 1801. Type: Agaricus qucrci- 

 nus L. 



