356 The Ohio Naturalist. [Vol. XI, No. 8, 



white to brown, but the mouths of the tubes are ahvays 

 regular and have thick dissepiments. Found on all sorts of 

 dead deciduous wood throughout the 3^ear. 

 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 irpicifonii 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. 41.5, f. 345. 



15. Coriolellus sepium (Berk.) Murrill, Bull. Torr. Club 32 : 481. 



1905. 

 Tr a metes 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 

 readih' distinguished by its size, habitat, and b}" the pores, 

 which are very large for such a small plant. 



16. Coriolellis serialis (Fr.) Mumll, N. Am. Flora 9 : 29. 1907. 

 Polyporus serialis Fr. 



Generalh^ 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. 



IS. 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 



