A cw ntienetemptincy ate ‘nmatpien etic ore 
pescees tne YS SAI Sat RS aa Po Ae eer ee ee ee 
62 MISSOURI BOTANICAL GARDEN. 
They probably belong to some one of the Agaricinae. The 
sclerotia had no very definite outer layer, and were uni- 
formly composed of very fine hyphae, loosely interwoven. 
Toward the periphery these became more or less parallel, 
and at certain points passed off in the form of long strands, 
resembling those passing off from the tubercles. Nowhere 
was any direct connection established between the two 
masses. 
On examining the gray tubercles more in detail, they 
are found to consist of a bundle of cylindrical bodies, much 
intertwined, evidently 
roots, which are covered 
and firmly held in place 
by a membrane or 
sheath. The latter is 
composed of fungus 
hyphae, arranged in two 
distinct layers, easily to 
be torn one from the 
other. The sheath as‘a 
whole is but loosely 
connected with the 
bundle of roots, as very 
slight teasing with a 
needle will enable one 
to pull off the whole 
intact. With this sheath HYPHAE FROM OUTER LAYER OF SHEATH (X520). 
the strands of hyphae al- 
ready mentioned are pulled off. Of the two layers, the 
outer is the thicker one. It is formed of hyphae parallel 
to each other, or nearly so, of a very large diameter 
and many-septate. The individual cells are about twice 
as long as they are broad, and in all cases are empty. 
The hyphae branch freely, and anastomose frequently with 
neighboring hyphae. One cell may have several branches 
(at ‘h’) either of the same diameter or smaller, one 
