Section Melanopus. 

 Polyporus dictyopus. 

 Polyporus Blanchetianus. 



POLYPORUS APUS. 



Context white. 

 Polyporus immaculatus. 



NOTE 103. This is a pure, white plant of the tropics and well named. The eon- 

 text is soft, friable, pure white, and "chalky." The pores are pure white, minute, with a 

 silky luster as turned to the light. Spores globose, 4 mic., smooth, hyaline. This is not 

 a common plant in the tropics, though widely distributed. Of course, it has many names. 

 Berkeley named it as above and also Trametes pura. He labeled a specimen in Hooker's 

 herbarium Polyporus immaculatus, and under this name sent it to Paris, and the name 

 was used by Patouillard, although never published by Berkeley. In addition, Polyporus 

 verecundus is probab'y the same thing. Hennings got it from New Guinea and immedi- 

 ately discovered it was a new species and called it the barbarous name Polyporus gogolensis. 

 Murrill, from the American tropics, referred it to Polyporous leucomallus, which is wrong, 

 we think, although the type is a little frustule, from which not much can be told. His 

 two synonyms are both right. When he got the same plant from the Philippines, however, 

 he discovered that it was a new species and called it Polyporus unguliformis. 



White species are all difficult, but this plant is so characteristic that we think no 

 one should confuse it. It seems to be confined to the tropics. 



Section depallens. 

 Polyporus lignosus. 



NOTE 104. Very thin form. This form was called Polystictus honduriensis by 

 Murrill. It is a question if Polyporus zonalis is truly distinct from it. 



Section Dichrous. 

 Polyporus adustus. 



The type form of Europe was not sent by Mr. Henri Perrier de la Bathie, but 

 two related plants. 



Section Glceoporus. 



This section with gelatinous hymenium is held by many as a distinct 

 genus. In temperate regions it is quite uniform, but in tropical countries 

 it takes several color forms. 



Polyporus dichrous. 



NOTE 105. This species has a gelatinous hymenium, hence is by some placed in 

 a separate genus, Gloeoporv.s. The type form with white flesh and purplish hymenium is 

 a very common plant in the United States, but is rare in Europe. We have the type form 

 also from Brazil, South Africa, and a similar, colored, but thinner plant from Japan. Mr. 

 Henri Perrier de la Bathie does not send the type form. 



In the tropics Polyporus dichrous has usually much paler colored hymenium and 

 was named Polyporus conchoides by Montagne, and a form with almost white hymenium 

 is called Polyporus candidus. The form from Henri Perrier de la Bathie, Madagascar 

 (named below), has a burnt umber hymenium, with no trace of the purple of the type form. 



Polyporus candidus. 



viz. the white form of conchoides (see above). 



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