applanatus in most all American literature. European mycologists have been 

 using the microscope on the spores of Fomes, and when I sent the plant 

 there it was noted that it had smooth spores, while the spores of Fomes 

 applanatus are rough. It was published in Mycological Notes in 1901 (page 

 60), which I think was the first time attention was drawn to this popular 

 error which had persisted in American mycology up to that date. Recently 

 it' has been announced that Leveille first called the plant "megaloma," but 

 I think that is largely guess work, and I have thus far been unable to find 

 any confirmatory evidence, but have found positive proof that Leveille de- 

 termined and published the plant as "Polyporus applanatus." 



Fomes pinicola. Well named, as it grows usually on coniferous trees. 

 Also has been the victim of a date dictionary and a very inappropriate name 

 has been dug up for it. 



Fomes rimosus. At least as it has always been known in Ahierican 

 mycology and always so determined when I sent it to Europe, but it is now 

 disputed, and I have no opinion on it. It grows very commonly at Cincin- 

 nati on the locust, but has never been found at Paris, where the locust- 

 tree, known to the French as "Acacia," is the most common, introduced 

 shade-tree there. 



Hydnum adustum. Frequent in America, not in Europe. 



Irpex pachylon. I learned this plant as Irpex crassus, the name ap- 

 plied to the American plant. Specimens I have sent to Europe have been 

 referred to Irpex pachylon by both Patouillard and Bresadola. I do not 

 know the European plant. 



Irpex tulipifera. Called also Polyporus tulipiferus and Poria tulipifera. 

 Said to be the same as Irpex lacteus and Poria sinuosa, concerning which 

 I do not know. It is a very common plant at Cincinnati, particularly on 

 the tulip-tree. 



Lenzites betulina. A frequent plant in many localities where "birch" 

 does not grow. Sometimes it is red-zoned. Usually it is the host of a 

 minute species of greenish .algae, which colors the pileus. Rarely I have 

 received a beautiful, striate form that has been mentioned by Prof. Peck. 



Lenzites sepiaria. This is a common species, but always on pine and 

 other coniferous trees. The name is well established and generally used. 

 Sometimes it takes a polyporoid form, or rather condition, I think. It can 

 readily be recognized by its color. 



Lenzites trabea. This is readily recognized from the habitat, as it 

 always grows on deciduous wood. I learned it under the name Lenzites 

 vialis, which has been mostly used in the United States. Daedalea pallido- 

 fulva is said to be the same. European mycologists to whom I have sent 

 the plant are in accord that it is Lenzites trabea of Europe, a statement that 

 has recently been disputed. I do not know. 



Panus rudis. A frequent plant in the United States; a rare plant in 

 Europe. It generally passed in American mycology under the name Len- 

 tinus Lecomtei until the error was pointed out (Myc. Notes, p. CO). 



Polyporus adustus. A most abundant plant at Cincinnati on fallen 

 beech. Very common everywhere, I think. 1 doubt if Polyporus fumosus is 



