22 Proceedings of the Ohio State .'Icadeiiiy of Science. 



above tlie water level. It covers large areas as a pure society 

 but is often associated with Potamogeton, Nelumbo, Castalia, 

 Typha and even Hibiscus. Thus in making one's way through 

 the cove at the mouth of Buckeye Creek, one encounters Typha 

 tussocks, a large patch of Xelumbo, Castalia, smaller dense 

 masses of Pontederia cordata, Scirpus lacustris with Utricularia 

 vulgaris or Potamogeton associated. In the center of the cove, 

 sheltered by the point and with water 2^ or less feet deep, is an 

 extremely dense, almost 'impenetrable mass of Potamogeton 

 zosterifolius with Ceratophyllum demersum under the surface. 



According to the topographic map, Buckeye Creek flows 

 through the center of this marsh. There is no evidence of flow- 

 ing water or an open channel and the zone of Typha lati folia 

 lining the shore is unbroken. 



A mile and one-eighth farther east. Honey Creek enters the 

 lake. Its channel has been kept open thru the marsh. The 

 lower portion looks more like a canal than a creek, with its uni- 

 form shores and earth banks. The channel at the mouth is 

 about fifteen feet; fifty yards up-stream it is not more than eight 

 feet wide with a uniform depth of 31^ inches. The fall in the 

 creek is so little that the current is barely noticeable. (Fig. 9.) 

 An extensive vegetation with well marked zonation spreads out 

 into the lake on either side of the creek. (Fig. 8.) These zones 

 are composed of : 



I. An association of semi-aquatics comprising three so- 

 cieties which show alternation rather than zonation. 



I. Nelumbo-Potamogeton society. 

 Principal species 



Nelumbo lutea 



Potamogeton lonchites 

 Secondary species 



Potamogeton pectinatus 



P. natans 



This society covers an area 100 feet broad on the west and 

 somewhat less on the east side of the creek. There are also 



