[Vor. 1 
124 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
ish, often wrinkled, glabrous or pruinose from a coating of 
brown conidial (?) spores, zonate or concentrically suleate, the 
margin thin and acute, sometimes lobed; context whitish to 
light brown, sometimes separated into an upper, light colored, 
soft layer, and a lower darker and firmer layer, but often uniform 
in color and texture, 0.2-1.5 em. thick; tubes 0.3-1.5 em. long, 
not decurrent, the mouths white or umber, darker when bruised, 
cireular to angular, averaging 3-5 to a mm.; the hymenium often 
with red-varnished patches on which no tubes are produced; 
stipe often entirely absent, lateral when present, covered like 
the pileus, 1-10 cm. long, 0.5-1 em. thick; spores yellowish 
brown, smooth or apparently slightly verrucose, ovoid with a 
truncate base, 5-6.3 х 9.4- 11g. 
On stumps and trunks of dead or injured deciduous trees. 
Common. 
The variation in the pileus from stipitate to sessile may be 
confusing at first, but the deep chestnut-red color, not changing 
to yellowish as in the next species, will usually be found to be 
the distinguishing character of the species. Тһе plant is de- 
scribed by Murrill under the name of Ganoderma sessile Murr. 
Atkinson has described a new species of Ganoderma from Ohio 
under the name of G. subperforatum. At the writer's request 
Professor Atkinson very kindly sent the type collection for 
examination. Under the ordinary high power of the microscope 
the spores of both P. lucidus and G. subperforatum appear to be 
praetieally smooth. Ву the use of the oil-immersion lens vary- 
ing degrees of apparent echinulation are to be made out in the 
ordinary forms of P. lucidus while in the type collection of G. 
subperforatum the spores do not have that appearance, although 
Professor Atkinson states that by first boiling the spores in 
potassium hydroxide solution the perforations in the spore walls 
are faintly visible. I am convinced, however, that the echinu- 
late appearance when present is not due to projections on the 
outer wall, but, as Atkinson has said, to perforations in the 
inner spore wall. An examination of the dozen or more col- 
lections of P. lucidus in my own herbarium have given evidence 
of a great variability in this character. Since G. subperforatum 
is not otherwise to be distinguished from P. lucidus, it has seemed 
best to consider the name as а synonym in this paper. Even 
