NEBRASKA WILD-DUCK FOODS. 



49 



CLEAR LAKE, CHERRY COUNTY. 



August 25, 1915. 



Description. — Some marsh at east end; narrow zone of wet meadow along 

 south shore. Largely open water ; average greatest depth, 7 to S feet ; bottom at 

 east and west ends mucky, while the other portion is sandy. No inlet ; overflow 

 into Willow Lake, during high water. 



DiSTKIBUTION OF VEGETATION. 



SHORE PLANTS. 



1. Bur reed (Sparganium eurycarpum). 



Sparse. 



2. Arrow-grass {TriglocMn rtmritima) . 



Common on wet shore. 



3. Cord-grass (Spartina michauwiana) . 



Sparse. 



4. Switchgrass (Panicum vlrgatum). 



Common. 



5. Hairy crabgrass (.Panicum huachucae) .* 



Common ; immature and mature 

 fruit. 



6. Saltgrass {Distichlis spicata).* Abun- 



dant ; mature fruit. 



7. Squirrel-tail (Hordeum juhatum).* 



Abundant. 



8. Broom-grass (Andropogon furcatus).* 



Common. 



9. Dropseed {Sporotolus asperif alius) .* 



Sparse. 



10. Bog reedgrass {Calamagrostis inex- 



pansa) . Common. 



11. Straw sedge [Cyperus strigosus). 



Common. 



12. Spike rush (Eleocharis acioularis). 



Common on wet shore. 



13. Sedge (Carex scoparia). 



14. Rush (Juncus halticus) .* Common on 



wet shore. 



15. Rush (Juncus dudleyi). Common. 



16. Rush (Juncus marginatus) . 



17. Bushy knotweed (Polygonum raniosis- 



simum).* Common. 



18. Heart's - ease (Polygonum pennsyl- 



vanicum) . 



19. Richweed (Pilea pumila). 



20. Dragon-head (Dracocephalum virgini- 



anum). 



21. Marsh mint (Stachys palustris) . 



22. Mint (Mentha canadensis). 



MARSH PLANTS. 



Consisting largely of: 



23. Big bulrush (Scirpus occidentalis) .* 



Others are : 



24. Squirrel-tail (Hordeum juhatum). 



25. Saltgrass (Distichlis spicata). 



26. Bushy knotweed 

 sissimum) .* 



(Polygonum ramo- 



SEMISUBMERGED PLANTS. 



Bominanis: 



27. Spike rush (Eleoharis acumitiata) . 



28. Big bulrush (Scirpus occidentalis) . 



Secondary species: 



29. Wapato (Sagittaria latifoUa). Sparse. 



30. Keed (Phragmites communis). Sparse. 



SUBMERGED PLANTS. 



Submerged vegetation is scattered and not abundant. 



Dominant: 



31. Sago pondweed (Potamogeton pectina- 



tus). 

 Secondary species: 



32. Belgrass pondweed (Potamogeton com- 



pressus). Common. 



33. Small pondweed (Potamogeton 



lus). Common. 



34. Illinois pondweed (Potamogjton illi- 



noenMs). Not abundant. 



35. Bushy pondweed (Najas flesnlis). 



Sparse. 



36. Coontail (Ceratophyllum demersum). 



Sparse. 



37. Water milfoil (Myriophyllum spica- 



tum. Sparse. 



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

 food for wild ducks are: Nos. 23 (28), 29, 31, 33, 35, and 36; those of less im- 

 portance are: Nos. 1, 2, 3, 4, 6 (25), 11, 12, 13, 18, 27, 32, 34, and 37; the re- 

 mainder are of no known value. 



120868°— 20— Bull. 794 4 



