24 



REMARKS ON A KEY TO THE OHIO PARASITIC 



FUNGI. 



BY F. L. STEVENS. 



(abstract.) 



A brief introduction to the study of parasitic fungi 

 in general is given, in view of the apparent need of such 

 to collectors of the state, in order that the work on the 

 Ohio cry ptogamic flora ma}^ be advanced. Books on 

 the subject are expensive, tutors often distant. A 

 little knowledge gained may be the means of saving 

 many specimens and greatly increasing the knowledge 

 of distribution. 



Types of the great classes of parasitic fungi, 

 ascigerous, p3xnidial and hyphal, are taken up and 

 brief general directions for their study given. It is 

 intended in this part to give sufficient instruction to 

 enable an earnest student to get a fair knowledge of 

 parasitic fungi and be able to use the key following. 

 An artificial key to description given, and then a key to 

 the genera. The genera are briefly treated regarding 

 their distribution, number of Ohio species, host, etc. A 

 glossorial page defining technical terms follows the 

 offer of the writer to furnish people desiring them with 

 typical species of the more common genera, gratis. 

 The offer is also made to undertake the classification o/ 

 any parasitic fungi sent for indentification. 



Only the fungi known to occur in Ohio or those 

 thought, by reasonable inference, to be here are men- 

 tioned. None of doubtful parasitism are considered 

 and the rare species and genera are omitted as they 

 would uselesslv incumber the student. 



