Murrill: Polyporaceae of North America 361 



lo. Cerrenella cfen. nov. 



o 



Type : Irpex tahacinns B. & C. Grevillea i : 102. 1872. 



Hymenophore thin, effused-reflexed, annual, epixylous ; sur- 

 face brown, zonate, anoderm, margin thin : context thin, coria- 

 ceous, brown; hymenium at first poroid, very soon becoming 

 irpiciform, the teeth irregular and compressed : spores smooth, 

 hyaline. 



Synopsis of tlie ^ortb American species 



Hymenium concolorous, teeth bright-brown in color. I. C. tahacina, 



Hymenium of a different color from the pileus, teeth covered with a greenish bloom. 



2. C coriacea. 



I. Cerrenella tabacina (B. & C.) 



Irpex tabacinits B. & C. Grevillea i : 102. 1872. 



Described from plants collected by Curtis in the Carolinas. Its 

 favorite host is decaying limbs of oak. 



Ravenel, Fung. Car. 3 : 22 ; Georgia, Ravenel ; Florida, Lloyd, 

 Calkins ; Louisiana, Langlois ; Missouri, Devietrio.. 



2. Cerrenella coriacea (B. & Rav.) 



Irpex co7iacetts B. & Rav. Grevillea I : 10 1. 1872. 



Described from Ravenel's South Carolina collections on dead 

 oak branches. According to Berkeley, this species was described 

 by Leveille from Bogota as Hydmmt trachyodon (Ann. Sci. Nat. III. 

 5- 302. 1846) and was likewise found by Wright in Cuba (/. 

 trachyodon B. & C. Jour. Linn. Soc. Bot. 10: 326. 1868. 



South Carolina, Ravenel ; Alabama, Peters ; Iowa, Holway. 



Species inquirendae 

 Irpex pityretis B. & C, Described from small specimens col- 

 lected by Bennett in Rhode Island. 



II. TTigroporus gen. nov. 



Type : Polyporiis vinosns Berk. Ann. Mag. Nat. Hist. 11. 9 : 

 196. 1852. 



Hymenium annual, epixylous, dimidiate-sessile to flabelHform, 

 glabrous : context dark -brown, firm, homogeneous ; tubes short, 

 slender, thin-walled, black : spores smooth, hyaline. 



Nigroporus vinosus (Berk.) 



Polyporiis vinosus Berk. Ann. Mag. Nat. Hist. 11. 9: 196. 1852. 



Described from plants collected in San Domingo. The species 

 IS easily recognized by its wine-colored context. 



Cuba, Wrip-ht. Earle & Undei^zvood 1^74. Earle & Mnrvill ijo. 



