[Vor. 1 
138 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
brown, darker when bruised, averaging 4 to a mm., walls rather 
thin but entire. 
On dead wood of deciduous trees. Common. 
This species is easily separated from F. applanatus Pers. ex 
Wallr. in that it is not perennial, and in that, if the plant revives 
the second year, the pileus comes out below that of the first 
year, and the latter persists as a dead decaying pileus. The 
second difference is in the character of the encrusting layer 
of the pileus. In F. applanatus Pers. ex Wallr. the crust is hard 
and horny and one cannot indent it with the thumb nail, while 
in Р. lobatus the crust is thin, and often becomes cracked and 
brittle when old, but is always rather soft and easily indented. 
TRAMETES Fries, Gen. Hymen. 11. 1836. 
Plants annual or perennial, epixylous, sessile; pileus corky 
or woody in texture, small or medium sized ; context white or 
brown (never red), descending into and forming the walls of 
the tubes; tubes typically appearing sunken into the context 
to unequal depths so that their bases are not in a continuous 
straight line; mouths circular or angular, never breaking up 
into teeth and rarely showing a daedaloid tendency. 
One species here included in the genus is perennial, all the 
others are annual. The chief generic distinctions are the unequal 
depths to which the tubes are immersed in the context, and 
the homogeneous texture of the context and trama. The first 
distinction is often not apparent except on very close examina- 
tion, and at times appears to break down entirely. Conse- 
quently, students will meet with some difficulty at times in 
deciding between the two genera, Trametes and Polyporus. 
KEY TO THE SPECIES 
Context white or whitish |... LLL 1 
Context brown or БгомлывЬ. 0000000 6 
1. Pileus densely hirsute or РОО POL PC vin. vy cu van vd koe 7. T. Peckit 
1. Pileus slightly pubescent to сз О E 2 
2. Mouths of the tubes minute, averaging 4-6 to a mm....... Т. robiniophilas 
2. Mouths of the tubes larger, averaging 1-3 to a mm..... TOME Io 3 
3. Pileus rather large; context more than 5 mm. thick; plant growing only 
НЕЗ аа 3. Т. suaveolens 
3. Pileus small, sometimes mostly resupinate; context less than 5 mm. 
thick; found on some other host. ..... 2,-0.0... а... 4 
1 For description of this plant see p. 104 under the genus Polyporus. 
