356 
The Ohio Naturalist. 
[Vol. XI, No. 8, 
white to brown, but the mouths of the tubes are always 
regular and have thick dissepiments. Found on all sorts of 
dead deciduous wood throughout the year. 
Illustration: Hard, p. 412, f. 342. 
13. Coriolus biformis (Klotzsch) Pat. Tax. Hymen. 94. 1900. 
Polyporus biformis Klotzsch. 
A very constant species found on logs and stumps from 
September until winter. The hymenium is at first porous 
but soon becomes lacerate and irpiciform and dries out to a 
light bay color. It is frequently found much imbricated 
and laterally confluent, sometimes for several feet along 
the log. Common. 
Illustration: Hard, p. 412, f. 341. 
14. Coriolus prolificans (Fr.) Murrill, N. Am. Flora 9 : 27. 1907. 
Polyporus prolificans Fr. 
Also known as P. pergamenus Fr. A variable species 
quite common on sugar maple, elm, wild cherry, and other 
deciduous wood. The mouths of the tubes are a beautiful 
purple color when the plant is young, but they fade out to 
bay or almost white. The hymenuim becomes irpiciform 
at an early stage. The purple colored hymenium will serve 
to identify this species. It is found from July until winter. 
Illustration: Hard, p. 415, f. 345. 
15. Coriolellus sepium (Berk.) Murrill, Bull. Torr. Club 32 : 481. 
1905. 
Trametes sepium Berk. 
Common on fence posts, dry rails, pickets, and old struc- 
tural timber. The single pilei are never more than 1 cm. in 
length but they are often found laterally confluent and 
sometimes almost wholly resupinate. The species can be 
readily distinguished by its size, habitat, and by the pores, 
which are very large for such a small plant. 
10. Coriolelli s serialis (Fr.) Murrill, N. Am. Flora 9 : 29. 1907. 
Polyporus serialis Fr. 
Generally known as Trametes serialis Fr. This species 
was reported by Morgan, but is probably rare in this state. 
On deciduous wood. 
17. Tyromyces guttulatus (Peck) Murrill, N. Am. Flora 9 : 31. 
1907. 
Polyporus guttulatus Peck. 
A doubtful species for Ohio. On coniferous wood. 
18. Tyromyces spraguei (Berk. & Curt.) Murrill, N. Am. Flora 
9 : 33. 1907. 
Polyporus spraguei Berk. & Curt. 
The writer has collected this species but twice, both col- 
lections being taken from beech logs. The whole plant 
