An Ecological Study of Buckeye Lake. 71 



The Rhus is taller and more abundant than the Alnus, and is 

 fruiting freely. 



Secondary Species. 



Tree etage 15-20 feet Acer rubrum 



Shrub etage 10-12 feet Aronia arbuti folia 



Tall herb 2-5 feet Osmunda cinnamomea, large 



spreading fronds 

 Low herb 8 in. -2 feet. Impatiens biflora, abundant near 



inner border 

 Triadenum virginicum 

 Dryopteris thelypteris 

 Ground cover Sphagnum acuti folium 



cymbi folium 

 Aulocomnium palustre 



A society of floating aquatics, Spirodeia polyrhiza with 

 Lemna trisulca underneath covers the surface of the waterways. 



The shrub society is much interrupted by stools of Typha 

 latifolia growing in the water. The plants are not quite as tall 

 as in the marsh zone and not flowering as freely. 



IV. Transition zone composed of a mixed vegetation of the 

 Heath and High shrub associations : This is a zone 28 feet 

 broad, characterized by tall thrifty Gaylussacia resinosa together 

 with several Rhus, Alnus and Acer rub'rum. The ground is dry, 

 with surface entirely above the water, wanting in vegetation and 

 covered with dry leaves and twigs. 



There are three small pools, one at the western and two near 

 the eastern margin of the transect, with Aulocomnium palustre 

 and Naucoria on its borders. The pools themselves contain no 

 macrophytes. The zone is a dense shrub growth with no herbs 

 except a few Osmunda cinnamomea and Dryopteris thelypteris 

 at the outer, northern margin, where the growth of Gaylussacia 

 ends abruptly and the High-shrub zone begins. There are well 

 defined etagen or layers, the tallest maple rises to 25 feet, the 

 smaller one and the tallest Rhus about 15 feet; the Alnus and 

 smaller Rhus 9-12 feet and then the dense growth of Gaylussacia 



