Murrill: Polyforaceae of North America 95 



The above description indicates that the author was possibly 

 deahng with old and darkened specimens oi Agariciis qiicrcinns. 



Daedalca piibenda B. & C. Grevillea i : 6^, 1872. Described 



from plants collected in Pennsylvania by Michener as follows : 



*' Pileo molli-suberoso, irregulari, dimidiato, hie illic tuber- 

 culoso, puberulo, ochraceo ; margine tenui : poris parvis demum 

 sinuatis. 



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<< 



Abo 



which is slightly zoned, attached behind, and more or less decur- 

 rent, even, with the exception of a few obtuse, tubercular, eleva- 

 tions, finely pubescent ; ochraceous ; pores about 1/50 inch 

 across, sinuated; of the same colour as the pileus." 



LENZITES Fr. Gen. Hymen. 10. 1836 



This genus, dedicated to Lenz, was described by Fries as 



follows : 



'* Lamellae coriaceae, radiantes, nunc simplices, nunc poroso- 

 anastomosantes, acie compaginatae ; dissepimento pileo floccoso." 



Fries lists only tliree species, L. betulina, L, abictiiia and L. 

 hctcrojiiorpJia, the first of which we consider the type. As at 

 present limited, the genus contains only tw^o North American 

 species, one very abundant in the United States and Canada and 

 the other known only from Cuba. 



Synopsis of tlie Korlti American species) 



Surface of the pileus conspicuously tomejitose. I- L. beiulina. 



Surface of the pileus finely pubescent. 2. Z. cubensis. 



I. Lenzites betulina (L.) Fr. 

 Agariais betulinus L. Sp. Pi. 1176. 1753.^ — Sowerby, Eng. 



Fung,//. 182. ^799- 

 Daedalea betidina Rebentisch, Prodr. Fl. Neom. 371. 1804. — 



Fr. Obs. I : 104. 18 15. 

 Lenzites betulina Yx, Gen. Hymen. 10. 1836. 



Linnaeus describes this species as " Agaricus acaulis conaceus 

 villosus : margine obtuso, lamelHs ramosis anastomosantibus/' 

 " Fl. Suec. 1085. Habitat in Betulis." Later botanists also de- 

 scribed it under various other names. The plant is exceedingly 

 common and is so well known as to need no description, being 

 found in abundance on old stumps, fallen branches and other 



