MY COLOG ICAL NOTES. 
BY O. O. LLOYD, 
No. 11. 
CINCINNATI, O. _ DECEMBER 1902. 
191-BOLETUS BETULA and B. RUSSELLI. 
By Prof. W. G. Farloyv. 
With regard to the identity of Boletus Betula Schw. and B. 
Russelli Frost suggested in Myeological Notes, No. 10, the following 
note may be of interest. The two species, although resembling one 
another in habit, can easily be distinguished by the spores, not to men¬ 
tion other peculiarities. The spores of B. Russelli are characterized 
by having on their surface a series of lines which pass nearly longitu¬ 
dinally, that is in the direction of the longer axis of the spores. On 
the other hand, the surface of spores of B. Betula are characterized by 
numerous papillae which are scattered and do not form lines and of 
which the diameter is greater than the diameter of the lines in B. 
Russelli. The last named species extends from Northern New Eng¬ 
land to Eustis, Fla., where it was collected by Prof. Thaxter. I have 
myself collected it in New Hampshire, Massachusetts and Rhode Island. 
B. Betula has not yet been found in New England I believe, but it is 
not uncommon in North Carolina where it was collected by Curtis and 
it was also collected by Prof. Thaxter in Tennessee. 
192—ACKNOWLEDGMENT OF SPECIMENS 
RECEIVED SINCE LAST REPORT. 
We desire to again thank each contributor who has kindly sent 
us specimens aiding us to gain a knowledge of the Gastromycetes. 
It will be noted that we are unable to name a great many speci¬ 
mens of Eycoperdon that we have received. We feel that very little 
is known about this genus in this country, and with the exception of 
a few strongly marked species such as gemmatum, pyriforme, subincar - 
natum and cruciatum, we can not name them. We feel now that 
enough material has accumulated in our museum so that the genus can 
be worked out, and we shall devote the winter to this work. Another 
season we hope to have definite ideas on the subject. We shall send 
the specimens to Patouillard, Bresadola, Hollos, Morgan, Peck, and 
others who have worked with the Gastromycetes and thus find out the 
different views that are held regarding them. At present there seems 
to be no uniformity, particularly in this country. The species that we 
have always taken for coloratum, one mycologist takes for caepeforme 
and another takes for pusillum. We hope to bring about an agreement 
of these conflicting views and to reach definite conclusions. It is im¬ 
possible to do anything with the ‘‘literature” on the subject. 
We have the same trouble with the genus Tylostoma. 
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