3-5 mm. thick, white, fleshy. Spores subglobose, piriform, with a minute apiculus, 

 4-4%x4 1 /2-5 hyaline, smooth, guttulate. 



This is a species of Polyporus, remarkable in being truly viscid. But one other has 

 been noted to my knowledge, ^iz., Polyporus viscosus, and that proved to be not a Poly- 

 porus, but a Boletus. Polyporus Yasudai evidently grows caespitose. Probably on wood, 

 but the collector does not state. It should be entered in Section 45c in my recent 

 pamphlet.' The drawing of the fresh plant submitted by Prof. Yasuda is bluish gray, as 

 are his collection notes, but the blue has largely disappeared in the dried specimens, 

 and reddish brown would more nearly characterize them now. 



NOTE 60. Correction. The arms of Lysurus borealis are attached to the apex of 

 the stem instead of the base as stated on p. 513 of Mycological Notes. 



The spores of "Tommyrot colossus" were given a little larger, 5 or 6 mic., instead of 

 4 mic., as stated on p. 7 of Letter 43. 



As my manuscript is largely prepared by dictation, these little obvious slips are often 

 occurring, although we try to take every precaution to avoid them. 



NOTE 61. Fomes pectinatus as found in Quelet and embalmed in the traditions of 

 Europe is a misdetermination for Fomes ribis. Fomes pectinatus is a tropical species 

 and does not occur in Europe. 



NOTE 62. Fomes Rhaponticus. Pileus sessile, 1-2 inches thick, 3-5 inches broad. 

 Context bright rhei color, with a peculiar shining effect and faintly zonate. Hyphae 

 bright yellow. Crust thin, smooth, subconcolorous. Pores minute, the indistinct layer 

 5-6 mm. thick, concolorous and with concolorous mouths. Setae rare, acute, with 

 swollen bases. Spores subglobose, 10 x 12 mic. smooth, colored. 



The context is not as hard and ligneous as most Fomes, but the annual layers 

 can be distinguished both in the pores and context. In its color and other characters 

 it is quite close to Polyporus dryadeus, an annual plant of Europe, and differs in its 

 perennial nature, and in its harder, smoother "crust. It is also quite close to Fomes 

 robustus of Europe, similar color and setae, but robustus has hyaline spores, and harder 

 context. 



Type specimens (Nos. 21 and 34) from Jintaro Umemuro, Mikawa, Japan, growing 

 on Quercus. 



NOTE 63. Fomes scaurus. Plant with an irregular, stipe-like base. Entire plant 

 and context dark brown, the upper surface paler. Pileus thin, 3-8 mm. thick, with a 

 smooth, rugulose crust. Pores minute, brown with concolorous mouths. Setae none. 

 Spores globose 4-5 mic., very pale colored. 



This plant is out of the ordinary. While it has a "stipe," it is not distinct and 

 well formed, and its relations are closer to the sessile section. In its general color and 

 appearance, also microscopic characters, it is close to Fomes ribis. The. spores are so 

 scanty I am not sure about them. They seem to be pale colored, but are almost hyaline. 



We have received two collections from A. Yasuda, Sendai, Japan (No. 12 and 

 No. Z), and Mr. Yasuda assures us the plant always has this stipe-like base. We re- 

 ferred incidentally to the plant in our Stipitate Polyporoids on page 195. If classed 

 as stipitate, it could be entered in section Pelleporus for want of a better place, but 

 it should be classed, we believe, with Fomes ribis. 



MINNESOTA MUSHROOMS. 



"Minnesota Mushrooms" is the title of a publication (Part 4) of Minnesota Plant 

 Studies. Although the work was issued in 1910, it nas just come to our notice. We were 

 in Europe when the work appeared. The author is F. E. Clements, State Botanist of 

 Minnesota. -,- : 



While, of course, the work is not exhaustive, we think it will prove one of the most 

 useful publications on American mycology, particularly to those who are not familiar 

 with the common species. It is well illustrated with photographic cuts that are character- 

 istic enough, so that the common fungi of the woods can mostly be easily identified. The 

 author should be strongly commended for two things: 



First, he used binomials as the names for the plants, and made no reference to the 

 biographical citations to those who are alleged to have named them. The general adoption 

 of this plan would cause very rapid advancement in mycology, for the mycologi^al worker 

 would then be more interested in finding out the truth than he would be in proposing as 



II 



