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This would lead one to think that in Pyronema we have an or- 
ganism that is very sensitive to the changes soils experience when 
heated. Kosaroff found that he could make a water extract of un- 
heated soil, which extract was unfavorable to Pyronema, while such 
an extract of a heated soil seemed to remove from the heated 
soil those substances which encouraged Pyronema growth. Thus, 
heating a soil seems to result either in producing substances 
favorable to Pyroxema or in causing the destruction of those 
which are unfavorable ; possibly by Aa processes brought 
about by the high temperature. We intend to investigate the 
soil changes produced by heat as indicated by the growth of 
Pigg and hope to apply some of our observations to the 
igher plants. The questions ve oe relationship of Pyroxema 
itself to the heating of soil are of no great practical importance 
but the sensitiveness of this fungus to soil changes arising in this 
way, makes Pyronema useful as an indicator of such changes and 
we hope to use it for this purpose in our wot 
Mr. Nash exhibited specimens of a grass unlike other grasses 
in general appearence. e called attention to a paper published 
by Dr. George Engelmann many years ago in which he described 
two new dioecious grasses, one of them the buffalo-grass, Buchloé, 
now known as Bulbiis, and the other the grass here under con- 
sideration, Monanthochloé hittorahs. The spikelets of this grass 
might be easily overlooked, as they are nearly concealed in the 
leaves of the short branches. The pistillate spikelets are some- 
times quite evident from the protrusion of the long styles of the 
flowers. The leaves of the branches merge right into the scales 
of the spikelets, the first one of which, were it not for the pres- 
ence sometimes of a palet, might be mistaken for a | 
The grass is found on or near the seacoast. Its distribution 
is interesting. Itis found on the Florida keys, from Elliott Key, 
at about 25° 30’ north latitude, its farthest north on the 
east coast, to Marquesas Key, to the west of Key West. Its 
next appearance is at Pine Island, on the west coast of Florida, 
at a little over 26° lat., its most northerly point on Hs east coast 
of the United States as indicated by herbarium material. 
seems to be no record of its occurrence along the entire a 
