An Ecological Study of Buckeye Lake. 117 



Ulmaceae. 



Ulnius americana L. Abundant and widely distributed, the domi- 

 nant tree in the forest zone of the lake shores and islands. 

 Has not yet invaded the b'og. 



U. fulva Mx. Sparingly on the levee, Orchard and other wooded 

 islands. 



Celtis occidentalis L. A few trees on the levee along north 

 shore of lake, in woods near Avondale, and one tree on 

 Rabbit Island. 



Moraceae. 



Morus rubra L. Orchard Island. 



Humulus lupulus L. One vine east shore of lake south of 

 Avondale. 



Urticaceae. 



Urtica dioica L. A very common herb in the forest zone of the 

 shore, Lewis and Charleston Islands. 



Urtica gracilis Ait. Forest zone, islands and shore. 



Adicea pumila (L.) Raf. Common in thicket at margins of 

 pools Cranberry Island, swampy woods along the shore and 

 on other islands. 



Boehmeria cylindrica (L.) Willd. Common and very generally 

 distributed in swampy woods and in the bog thicket of Cran- 

 berry Island. 



Polygonaceae. 



Rumex brittanica L. Common in marsh zone Cranberry Island. 

 R. crispus L. Rather common along the margin of the lake. 

 R. verticillatus L. At water's edge. Cranberry Island. 

 R. obtusifolius L. Orchard Island, forest zone. Lieb's Island, 



ruderale zone. 

 Polygonum hartwrightii A. Gray. Zone of ruderals north side of 



Lieb's Island. 

 P. emersum (Mx.) Britt. Abundant and widely distributed, 



grows in the lake at a depth of 55^ feet, forms large mats in 



shallower water, forms well defined zones along shores and 



grows also on exposed mud flats. 



