l6o OHIO STATE ACADEMY OF SCIENCE. 



typical moisture-loving shrubs, forming at some places an almost 

 impassable hedge. At the north-west where the small ditch 

 opens into the lake the shrubs have invaded the water, Salix 

 sericea Marsh, and S. lucida Muhl. advancing farthest. 



The most characteristic plants are a number of species of 

 Salix, Cephalanthus occidentalis L., Cornus stolonifera Mx. and 

 Rosa Carolina L,. The complete list of shrubs found numbers 

 fifteen species and two forms, as follows : 



Salix discolor Muhl. Rosa Carolina I,. 



" sericea Marsh. Solarium dulcamara L,. 



" cordata Muhl. Cornus stolonifera Mx. 



" cordata augustata(Pursh.) And. " amomum Mill. 



" sericea x cordata. Cephalanthus occidentalis L,. 



' ' lucida Muhl. Viburnum opulus L. 



" nigra Marsh. " lentago L,. 



' ' amygdaloides And. Sambucus canadensis Iy. 

 Ribes cynosbati L. 



Several of these develop into large trees, but none had 

 advanced beyond the shrub stage, either on account of age or 

 other causes. Because of the great density of the shrub thicket 

 very few herbs gain a footing in this zone except in the more 

 open places. The following sixteen species were collected : 



Spathyema foetida (!_,.) Raf. Naumbergia thyrsiflora (L,.) Duby. 



Polygonum persicaria L,. Asclepias incarnata L,. 



Caltha palustris L. Blephilia hirsuta (Ph.) Torr. 



Ranunculus abortivus L. Mentha canadensis L. 



Geum canadense Jacq. Monarda fistulosa L. 



Cassia marylandica L,. Veronica peregrina L,. 



Lathyrus palustris L,. Campanula americana L,. 



Viola obliqua Hill. Rudbeckia speciosa Wend. 



7. Forest Zone. The inner part of the forest zone is 

 hydrophytic or semi-hydrophytic. It is typically an Acer-Ulmus- 

 Fraxinus-Salix zone. The soil is largely made up of vegetable 

 and shell humus, in which, besides the tree growth, are found 

 large numbers of semi-hydrophytic and mesophytic shrubs and 

 herbs. On the east and west sides there is only a narrow fringe 

 of forest left, the hillsides having been entirely denuded of their 

 former mesophytic forest. On the north and south ends there 

 are still rather wide strips of hydrophytic forest, but beyond these 

 the forests have also been destroyed so that it is impossible at 



