33 2 
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 sativa L. 
Salix amygdaloides Andr. 
Ulmus americana L. 
Polygonum lapathifolium L. 
Polygonum persicaria I,. 
Atriplex hastata L. 
Scutellaria lateriflora I.. 
Lycopus americanus Muhl. 
Cephalanthus occidentalis L. 
Leptilon canadense (L.) Britt. 
Bidens frondosa L. 
Bidens connata Muhl. 
Carduns sp. 
Of these the Avena, Ulmus, Uycopus, 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 
carried in this way. The other nine have small seeds which may 
have floated over from neighboring islands or the}' may have been 
carried in the mud sticking to the feet and feathers of birds. An 
apple was found washed ashore, but 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, because of the limited amount of soil and other 
adverse conditions. 
