Murrill: Polyporaceae of North America 97 



*' Pileus hard, sessile, dimidiate, lobed, deeply zoned, tawny, 

 velvety. Gills rather thick," 



'* New Orleans and other parts of North America. Hooker 

 Herbarium. The pileus is by no means tomentose, but. clothed 

 with very short close velvety pubescence. Vertex sometimes 

 lengthened out into a sort of stem. Thelephora lohata varies in 

 the same way." 



Leveille's description of the species is as follows : 



" Pileo coriaceo flexili subreniformi sessili hirsuto fulvo zonis . 

 confertis prominentibus notato, lamellis latissimis distantibus acie 

 integris ochroleucis." 



*'Chapeau presque reniforme, coriace, large de 4 a 8 centimetres, 

 d'une belle couleur fauve, avec des zones saillantes et assez rap- 

 prochees ; les lames sont tres larges, comparees a I'epaisseur du 

 chapeau, jaunes, a marge tranchante et entiere." 



In their Commentary on Schweinitz' Synopsis, Berkeley and 



Curtis determine no. 486, '' D. an gibbosa^ ? " as Lenzites Bcrkekyi 

 Lev. 



CERRENA S. F. Gray, Nat. Arr. Brit. PI, I : 649. 1821 



This genus was founded upon Cerrena cinerea (Pers.), a single 

 species. The very brief generic description, *'Stem distinct: cap 

 semicircular," is followed by the citation of two synonyms and a 

 short description of the species. Although the descriptions are 

 unsatisfactory, the citations point very plainly to a definite and well- 

 known species as the type of the genus. 



Cerrena unicolor (Bull.) Murrill 



Boletus unicolor Bull. Herb. France, //. ^08. 17SS. //. 501, 

 1791. — Bolt. Hist. Fung. Halifax, Append. 163. //• i6j. 

 r/Ql. — Sowerby, Eng. Fung. //. 32^- 1 801. 



Boletus decipiens Schrad. Spic. 169. 1794. 



Sistotrenia cincremn Pers. Syn. 551. i8or. 



Daedalea unicolor Fr. Syst. I : 336. 182 i. 



Phyllodontia Magnusii Karst. Hedvv. 22: 163. 18S3. 



Cerrena unicolor Murrill, Jour, Myc. 9: 91- 1903- 



This species w^as first described from France byBulhard. The 



ordinary form has been known for a long time, but European 



mycologists were considerably puzzled in 1876 by the discovery 



of a peculiar hydnoid form on a birch stick in the fern house at 



