Murrill: Polvporaceae 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. Tliclcplwra lobata 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 l'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 Berkeleyi 

 Lev. 



CERRENA S. F. Gray, Nat. Arr. Brit. PI. 1 : 649. 1821 

 This genus was founded upon Ccrrcna cinerca (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. 1788. //. 501. 



1791. — Bolt. Hist. Fung. Halifax, Append. 163. pi. i6j. 



1 791. — Sowerby, Eng. Fung. pi. J2j. 1801. 

 Boletus decipiens Schrad. Spic. 169. 1794. 

 Sistotrema cincreuni Pers. Syn. 551. 1801. 

 Daedalea unicolor Fr. Syst. I : 336. 1821. 

 Phyllodontia Magnusii Karst. Hedw. 22 : 163. 1883. 

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



This species was first described from France by Bulliard. 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 



