MUKKII.I. : POI-YPOKACEAE OF NORTH AMERICA 43 



The plant grows upon dead wood and has the liabit of P. 

 clegans, but is larger and darker in color. It often jiersists, how- 

 ever, until bleached nearly white. Exsiccati have been studied 

 from Maine, Ilarvcy, Miss White; Connecticut, Umicriuood ; 

 Massachusetts, Seymour ; New York, Clinton, Ovcrackcr ; Penn- 

 sylvania, Everhart ; Vermont, Far/oza ; Kentucky, Price ; Wash- 

 ington, Parker; Michigan, Wood, Miss Minns. 



Species IsguiRENDAE 



Polyporus aviygdalinus B. & Rav. Grcvillea, l: 49. 1872. 

 This species is said to differ from P. caudicinus in having smaller 

 tubes, but it is probably only a form of that species in an unde- 

 veloped stage. I have not been able to find a type specimen. 



Polyporus cyathifornus Lev. Ann. Sci. Nat. Hot. III. 2 : 181. 

 1844. The type of this species was probably burned with most 

 of Leveille's types during the occupation of Paris by the Germans. 

 The description corresponds closely with P. cratercllus, but it is 

 difficult to determine that the two species are identical. 



Polyporus pachypus Mont. PI. Cell. Cuba, 421. 1842. This 

 species is described as caespitose, with thick excentric stipe and 

 membranaceous tubes, which are small and rounded near the 

 margin and large and favoloid near the stipe. No types have 

 been found in foreign herbaria and Montagne himself said in his 

 Sylloge that the species needed further investigation. 



Polyporus stipitarius B. & C. Jour. Linn. Soc. Bot. 10 : 304. 

 1868. The original description just cited does not materially as- 

 sist one in interpreting the type plants in the Berkeley herbarium. 

 Most of these types so closely resemble P. Tricholoma that a new 

 description of them seems superfluous ; and the one card of speci- 

 mens which appears to be somewhat different from the rest was 

 listed under P. Tricholoma by Berkeley at the time that P. stipitarius 

 was described. Judging from the Kew collections, P. stipitarius 

 appears to differ from P. Tricholoma chiefly in possessing a longer 

 stipe, yet the description calls for a stipe shorter than that of /-*. 

 Tricholoma. New material may possibly throw light on this prob- 

 lem, but I seriously doubt if Berkeley's species can ever be en- 

 tirely disentangled from the earlier one of Montagne. 



Polyporus gracilis Kl. Ann. Nat. Hist. 3: 384. 1839. This 



