Murrill: Polyporaceae of North America 335 



3. Pileoli lateral, spatulate or dimidiate. 3. G. fronJosa. 

 Pileoli centrally attached, circular and umbilicate. 4. G. ratnosissima. 



4. Sporophore of immense size, 20-60 cm. in diameter, spores echinulate, 8-9^. 



5. G. Berkeleyi. 



Sporophore small for the genus, only 8 cm. or less in diameter, spores smooth, 



ovoid, much smaller. 6. G. fractipes. 



i. Grifola poripes (Fr.) 



Poly poms pari pes Fr. Nov. Symb. 48. 185 I. 



Polyporus flavovirens B. & Rav. Grevillea, 1 : 38. 1872. 



Small plants of this species from the collections of Curtis 

 were described by Fries in 185 1. Somewhat older plants were 

 later renamed by Berkeley and Ravenel, the name referring to the 

 very characteristic mixture of yellow and green in the plant as it 

 develops. Most of the herbarium specimens of this species are 

 young and do not properly show the systematic position of the 

 plant, its relationship clearly being with Grifola instead of Scutiger. 

 It occurs on the ground in woods, rising from a tubercle and 

 spreading broadly in irregular lobes. The substance is eaten by 

 insect larvae. Specimens have been examined from Massachu- 

 setts, Blake, Rickcr ; Canada, Dcarness ; New York, Long ; Dela- 

 ware, Commons; New Jersey, Ellis ; Ohio, Morgan; Pennsylvania, 

 Everhart ; Virginia, Murrill ; and Carolina, Ravenel. It is fairly 

 common and always eagerly picked by collectors. A good de- 

 scription of it may be found in the Journal of Mycology for Jan- 

 uary, 1886. Ellis there makes some corrections in the original 

 description of Berkeley and Ravenel. 



2. Grifola Sumstinei sp. no v. 



A very large plant resembling G. frondosa in habit and general 

 appearance, but with fewer and broader pileoli, darker surface and 

 darker hymenium. Pileus imbricate-multiplex, 20 x 30 cm., pile- 

 oli flabelliform to spatulate, 6-8 x 6-8 x 0.3-0.5 cm. ; surface 

 radiate-rugose, finely tomentose, light to dark brown ; margin 

 very thin, fissured and strongly indexed when dry : context white, 

 fibrous, fleshy-tough to almost leathery, 0.3 cm. thick ; tubes 0.2 

 cm. long, 7 to a mm., at first fuliginous, becoming pallid at 

 maturity, polygonal, irregular, edges very thin and fragile, becom- 

 ing lacerate ; spores globose, smooth, hyaline, thin-walled, copi- 

 ous, 5 fi : stipe tubercular, woody, blackish below, connate- 

 ramose, lighter-colored, passing insensibly into the pileoli above. 



