22 The Ohio Naturalist. [Vol. XIII, No. 1, 



1. Aerial stems evergreen, rough to a greater or less degree; 



cones tipped with a rigid point. 



a. Sheaths cylindrical, not dilated upward, usually with 



2 black bands, sometimes entirely black; stems 

 rough, tuber culate. 



E. hyemale. 



E. robustum. 



b. Sheath elongated, dilated upward, with a narrow 



black band at the top and frequently with a second 

 irregular one below; stems smoothish, only slightly 

 tuberciilate. 



E. laevigatum. 



2. Aerial stems annual, smooth; cones without a point. 



a. Stems usually unbranched except when broken; 

 sheaths elongated, dilated upward, with a narrow 

 black band at the top, rarely with a faint second 

 one below. 



E. kansanum. 



In conclusion, the writer wishes to express his thanks to the 

 directors and curators of the three herbaria visited, for courtesies 

 shown in the study of the valuable materials without which the 

 solution of the problem to the writer's satisfaction would have 

 been much more difficult. 



CONCERNING OHIO POLYPORACEiE. 



L. O. OVERHOLTS. 



In the June number of the Ohio Naturalist for 1911 an article 

 by the present writer appeared entitled "The Known Polypo- 

 raceas of Ohio." Since the appearance of that article attention 

 has been called to certain omissions, both in the enumeration of the 

 species and in the bibliolgraphy that was appended, and it was 

 thought best to take this means of making the corrections. 



The paper was a preliminary list of species intended to be used 

 as the basis for a key to the genera and species. Illustrations were 

 cited and a bibliography was appended in the effort to get collectors 

 in different localities to give some attention to this group, in order 

 that some definite knowledge of the number and identity of the 

 species might be obtained. The list was based on the writings 

 of Berkeley, Hard, Lea, Lloyd, Montague, Morgan and Murrill. 



Several collections of specimens were recievcd from corres- 

 pondents in various parts of the state and specimens were exam- 

 ined in the state herbarium at Columbus and in the Lloyd museum 

 at Cincinnati. Many collections were made in the Miami valley 

 by persons connected with the department of Botany at Miami 

 University. These latter arc for the most part in the writer's 



