82 Proceedings of the Ohio State Academy of Science. 



Solanum nigrum Meibomia viridiflora 



Epilobium strictum Eupatorium ageratoides 



Verbena urticifolia purpureum 



Rumex obtusifolius Bidens bipinnata 

 Geum canadense 



Fungi : 

 Agaricus campestris Lycoperdon wrightii 



The forest association extends across the island from margin 

 to margin, and presents two distinct zones: i. A border zone 

 20-30 feet wide, consisting in part of large trees, the remnant of 

 the original forest. It is a very open border, not more than three 

 trees deep, the tallest of these trees having attained a height of 

 60-65 ^^^^- The shrub stratum is very poorly developed. It is 

 represented on the south side by a few Cornus, Rosa and Ceph- 

 alanthus, at the outer margin of the zone; these are wanting on 

 the north side. The field stratum is composed almost wholly of 

 grasses of which Muhlenbergia diffusa, Agrostis perennans and 

 Syntherisma sanguinalis and linearis are the principal species. 

 Associated with these is a scanty growth of herbs; and on the 

 south side an abundant growth of Rhus toxicodendron, Parthen- 

 ocissus quinquefolia and Vitis vulpina trailing over the ground. 

 The Rhus has also climbed two Ulmus americana. The grass and 

 weeds have been mowed, so that the shrubs too are kept in a 

 stunted condition. 



Surrounded by the older forest zone lies a rejuvenated area 

 clothed with young forest trees, among which Ulmus americana 

 predominates; fully nine-tenths of the trees are of this species. 

 This is a part of the area which was cleared sixteen years ago; 

 but the forest has again invaded it and become established. The 

 ground slopes gently downward toward the southeast and more 

 abruptly toward the northwest. The elevation of the highest 

 portion is not more than 4 or 5 feet above the standard water 

 level. The gentle slope and the thin shade of the young trees, 

 together with the loose, light soil, provide a dry, sunny habitat 

 on which Carduus, Aster, Arctium, Hedeoma, Nepeta, Erigeron 



