332 The Ohio Naturalist. [Vol. Ill, No. 2, 



I made a careful search for all the species of plants growing on 

 the island, and since such a flora must be quite transient, it is 

 here recorded. Aside from a few of the lower algae and fungi 

 on the rocks and dead organic matter, Marchantia polymorpha 

 and several mosses were the only lower forms present. Fifteen 

 species of seed plants were determined, and there may have been 

 several more species of Polygonum, but they were not mature 

 enough for satisfactory determination. Following is the list of 

 species : 



Ecliinochloa crus-galli (L.) Beauv. 



Agrostis alba L. 



Avena saliva L. 



Salix ainygdaloides Andr. 



Ulinus aniericana L,. 



rolygonimi lapathifoliuni L- 



Polygonum persicaria L. 



Atriplex hastata L. 



Scutellaria lateriflora L. 



Lycopus americauus Muhl. 



Cephalanthus occideutalis L. 



Leptilon canadense (L,.) Britt. ^ 



Bidens frondosa L. 



Bideiis connata Muhl. 



Carduns sp. 



Of these the Avena, Ulmus, Lycopus, Cephalanthus and 

 Carduns were leading a very precarious life. It will be seen from 

 the list that there are only two plants which have barbed fruits. 

 Four have adaptations for wind distribution and may have been 

 <:arried in this way. The other nine have small seeds which may 

 have floated over from neighboring islands or they may have been 

 carried in the nuid sticking to the feet and feathers of birds. An 

 apple was found washed ashore, l)ut there would be little chance 

 for such a plant to gain a foothold on the island. It is probable 

 that most of the seeds which arrive find it impossible to establish 

 themselves, becau.se of the limited amount of soil and other 

 adverse conditions. 



