4^ THE PLANT WORLD. 



Epilobimn adenocaulon, E. linearis Polygomiui Hartivrightii^ Cnicus 

 altissiimis, Teiicrium Canadensis^ McntJia Canadensis, E^ipatoriuvi 

 perfoliatum, Helianthiis gross-serratus. Lythruiit alatnni. 



Introduced species, Ambrosia artemisicefolia, Cnicus lanceolata, 

 ChaetocJiloa glaiica, annuals except Cnicus lanccolata. As most of the 

 outer shore-line is covered with water in the spring, many of the 

 common perennials are destroyed. The annuals spring- up after 

 the water subsides. 



Inner Beach. The inner beach is, from the nature of the case, 

 longer covered with water than the outer, and supports in part a very 

 different vegetation. The most abiindant plant is the Cat-tail (TypJia 

 latifolid). This beach may be called the TypJia beach. The Typha 

 is much more sensitive to moisture ; water is within easy reach, al- 

 though the surface is dry. The chief plants of the Typha beach are 

 Paniciim criis-galli, P. capillare, the latter of very slender plants and 

 unlike those of dry places, some Calamagrostis Canadoisis, Phalaris 

 aru)idinacea, some Car ex sp., Alisnia plant ago, var. Americana, Poly- 

 gonum acre abundant, Epilobium adenocaiilon, E. lineare, Asclcpias 

 incarnata, some Scirpus lacustris. 



A second division of the inner beach contains chiefly Phrag- 

 mites conwuinis, a plant that once was common throughout this region. 

 Now, however, it is gradually being replaced by other species. The 

 Phragmites often fails to flower, owing no doubt largely to the absence 

 of water. Along with Phragmites occurs Alisma plantago, var. Ameri- 

 cana, Sagittaria variabilis, Elocharis palustris and Scirpus lacustris. 



In the third division or Zisania zone, there is some standing 

 water. This is characterized by the abundance of Zizania aquatica, 

 Leersia oryzoides, Panicum crus-galli, Elocharis palustris, E. acicularis, 

 Nuphar advena, and NympJuca tuberosa, Pontederia cordata. Ranuncu- 

 lus multifidus, and R. aquatilis, var. frichophyllus. Under present 

 conditions this portion of the lake contains standing water during the 

 entire season. 



High Moist Beaches. These are not covered with water, but are 

 extemely moist in the spring and support in part a hydrophytic 

 vegetation, Polygonum Muhlenbergii, Calamagrostis Canadensis, Ly- 

 thrum alatum, Gcrardia purpurea., Polygonatum giganteum, Panicum 

 crus-galli, Spiranthes cernua, Lathyrus palustrius, Lobelia syphilitica, 

 L. spicata, and such mesophytic plants as Panicum capillare, Thalic- 

 tum purpurascens. Astragalus Canadensis, Sporobolus heterolepis, 

 Glyceria nervata, 7 halictriii/i purpurascens, and Solidago Riddellii. 



Hill or Island Vegetation. The two moranic islands are 

 small in extent. These islands have been covered with trees for a 

 long time, as evidenced by the large trunks remaining. There are no 



