MURRILL : POLYPORACEAE OF NORTH AMERICA 485 



Species : P. hydniceps B. & C, P. scabriccps B. & C, P. virga- 

 tus B. & C, P. delicatus B. & C, P. dibaphus B. & C, Z 3 . /Wr- 

 /><>/-//.* (Retz) Murr., P. 7*&i B. & C, P. craterellus B. & C, P. 

 Acicula B. & C, P. discoideus B. & C, P.phaeoxanthus B. & Mont., 

 P. columbiensis Berk., P. obolus Ell. & Macbr., T 3 . aemulans B. & 

 C, P. arcularidlus Murr., P. arcularius (Batsch) Fr., P. variiporus 

 Murr.,/ 5 . TricJioloma Mont., P. Cowellii Murr., P. candicinus (Scop.) 

 Murr., P. maculosus Murr., P. elegans (Bull.) Fr., P.fissus Berk., 

 P. arculariformis Murr. [See Bull. Torrey Club 31 : 29—44, 

 1 904 ; and Torreya 4 : 150, 151. 1904.] 



Synopsis of the Polyporeae with bright-colored context 



Hymenophore sessile or subsessile. 

 Pores yellow. 



Context thick and lleshy, plants very large. I. Laetiporus. 



Context thin ; plants small. 2. Flaviporellus. 



Pores red. 



Context very soft and spongy, tubes large and irregular. 3. Aurantiporellus, 

 Context firm, tubes small. 



Surface anoderm, tubes fragile. 



Tubes orange-colored, becoming dark and 



resinous on drying. 4. Aurantipvrus. 



Tubes remaining orange-colored, or fading 



slightly. 5. Pycnoporellus. 



Surface pelliculose, tubes firm and regular. 6. Pycnopoms. 



Hymenophore distinctly stipitate ; context yellow. 7. Phaeolopsis. 



I. LAETIPORUS Murr. Bull. Torrey Club 31 : 607. 1904 

 Type : Agaricus spcciosus Batarr. 



Hymenophore annual, epixylous, fleshy, anoderm, cespitose- 

 multiplex ; context cheesy to fragile, light-colored, tubes thin- 

 walled, fragile, bright-yellow, mouths irregularly polygonal ; spores 

 smooth, hyaline. 



Species : L. spccios/ts (Batarr.) Murr. [See Bull Torrey Club 

 31 : 607, 608. 1904.] 



2. Flaviporellus gen. nov. 



Type : Polyporus Splitgcrberi Mont. 



Hymenophore small, annual, epixylous, sessile or substipitate, 

 flabelliform, yellow throughout ; surface anoderm, margin thin ; 

 context very thin and friable ; tubes small, thin-walled, fragile ; 

 spores smooth, hyaline or yellowish. 



