46 



BULLETIN 794, U. S. DEPARTMENT OF AGEICULTURE. 



MIDDLE CHAIN LAKE, BROWN COUNTY. 



August 16, 1915. 



Description. — Marsh at east end. Bog at west end, which is inaccessible. 

 Lake entirely filled with vegetation. Bottom mucky; greatest depth, 4 feet; 

 inlet from West Chain Lake during high water ; outlet into East Chain Lake. 



DiSTBIBXJTION OF VEGETATION. 

 SHORE PLANTS. 



1. Cord-grass (Spartina michauxiana) . 



2. Switchgrass (Panicum virgatum). 



3. Redtop (Agrostis allia). 



4. Couch-grass (Agropyron repens). 



5. Wild millet (Echinochloa crus-galli) . 



Common. 



6. Wild rye (Elymus canadensis). Com- 



mon. 



7. Indian grass (Sorghastrum nutans). 



8. Shining sedge (Cyperus rivularis). 



9. Straw sedge (Cyperus strigosus) . 



10. Sedge (Carex scoparia). 



11. Sedge {Carex nebraskensis) . 



12. Rush (Juncus nodosus). 



13. Rush (Juncus marginatus). 



14. Rush (Juncus dudlcyi). 



15. Water hemlock (Cicuta maculata). 



SEMISUBMERGED PLANTS. 



Dominants: ' 



16. Wapato (Sagittaria latifoUa). 



17. Big bulrush (Scirpus occidentalis) . 

 Secondary species: 



18. Bur reed (Sparganium eurycarpum). 

 10. Cat-tail (Typha latifoUa) . 



20. Spike rush (Eleocharis acuminata). 



21. River bulrush (Scirpus fluviatilis) .* 



Abundant ; mature fruit. 



22. Reed (Phragmites communis). 



23. Wild rice (Zizania palustris). Very 



little. 



24. Water smartweed (Polygonum amphi- 



bium,) . 



STJBMEEGED PLANTS. 



Dominants: 



25. Waterweed (PMlotria canadensis) . 



26. Coontail (Ceratophyllum demersum). 

 Secondary species: 



27. Sago pondweed (Potamogeton pecti- 



natus) . 



28. Eelgrass pondweed (Potam^ogeton com- 



pressus). 



29. Floating pondweed (Potamogeton no- 



tans). 



30. Curly pondweed (Potamogeton per- 



foliatus richardsonii) . 



31. Small pondweed (Potamogeton pusil- 



lus). 



Wild-duck foods. — Plants in the above list which have considerable value as 

 food for wild ducks are : Nos. 5, 16, 17, 23, 26, 27, and 31 ; those of less impor- 

 tance are : Nos. 1, 2, 8, 9, 10, 11, 18, 21, 24, 25, 28, 29, and 30 ; the remainder 

 are of no known value. 



NoTKS ON Other Brown County Lakes. 



There are about 20 acres of wild rice {Zizania palustris) at the west end of 

 Long Lake, and about 20 to 30 acres at Frank Wales Swamp, between Long 

 Lake and Clopper Lake. Filbrick Lake is said to contain a considerable area 

 of rice. 



DEWEY LAKE, CHERRY COUNTY. 



August 21-24, 1915. 



Description. — Extensive marsh area at west end of the lake. Mostly open 

 water ; depth 9 to 10 feet ; bottom mostly sandy except at west end and ex- 

 treme east end, which is muck. Outlet into Willow Lake; inlet from White 

 Water Lake ; this inflow from White Water Lake during high water has prob- 

 ably rendered Dewey Lake, somewhat alkaline. 



