FEBEASKA WILD-DUCK FOODS. 



65 



FLOATING PLANTS. 



54. Star duckweed (Lemna trisutca). 

 Common. 



52. Big duckweed (Spirodela polyrhima) . 



Common. 



53. Small duckweed {Lemna minor). 



Common. 



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

 as food for wild ducks are : Nos. 24, 28, 29, 32, 39, 40, 43, 44, 46, 52, 53, and 54 ; 

 those of less importance are: Nos. 1, 2, 3, 6, 10 K36, 48), 11, 20, 26, 27, 31, 33 

 (47), 34, 42, 45, 49, and 50; the remainder are of no known value. 



RED WILLOW LAKE, CHERRY COUNTY. 



October 9, 1915. 



Description. — Very small amount of marsh at west end. Well filled with 

 vegetation. Fresh water; average greatest depth 4^ feet; bottom mostly 

 sandy. No outlet or inlet. No current except as caused by wind. 



Distribution of Vegetation. 



SHORE plants. 



-. Typical wet-meadow plants. 



1. Saltgrass {Distichlia spicata).* Ma- 



ture fruit ; abundant. 



2. Western wheat-grass (Agropyron 



smitliii).* Mature fruit ; common. 



3. Switchgrass {Panlcum virgatum) .* Ma- 



ture fruit : abundant. 



4. Fragrant sedge (Cyperus infletrus).* 



Mature fruit ; abundant. 



5. Straw sedge {Cyperus strigosus) .* Ma- 



ture fruit ; abundant. 



6. Three-way sedge (Dulichium arundina- 



ceum ) . * Common. 



7. Spike rush {Eleocharis acicularis) .* 



Mature fruit ; abundant. 



8. Rush (Juncus marginatus) .* Mature 



fruit. 



9. Rush (Juncus canadensis).* Mature 



fruit ; abundant. 



10 



Immature 



11 



14 



15 



18 



19 



interior) . 



Rush (Juncus balticus).* 



fruit. 

 Rush {Juncus, probably 



Mature fruit. 

 Willow {Salix prinoides).* Sparse. 

 Golden dock {Rumex persicarioides) .* 



Mature fruit ; common. 

 Bushy knotweed {Polygonum ramosissi- 



mum.).* Mature fruit; sparse. 

 Water hemlock {Cicuta hulbifera).* 



Sparse. 



16. Bugleweed {Lycopus uniflorus) .* Flow- 



ers, to mature fruit ; common. 



17. Ragweed {Ambrosia elatior).* Flow- 



ers ; common. 

 Bushy goldenrod {Euthamia graminifo- 



lia).* Flowers, to mature fruit; 



common. 

 Bur marigold {Bidens laevis). 



SEMISUBMEEGED PLANTS. 



Dominant : 



20. Tule {Scirpus validus). 

 Secondary species: 



21. Cat-tail {Typha latifoUa). Sparse. 



22. Bur reed {Sparganium eurycarpum) . 



Sparse. 



23. Water plantain {Alisma, subcorda- 



tum).* Common. 



Com- 



24. Wapato {Sagitfaria latifolia). 



mon. 



25. Cord-grass {Spartina michauxiwna) . 



Common. 



26. Three-square {Scirpus americanus). 



Common. 



27. Water smartweed {Polygonum ampMbi- 



um) .* Mature fruit; common. 



SUBMERGED PLANTS. 



Domin4m,t : 



28. Water milfoil {Myriophyllum spica- 



tum).* Mature fruit. 

 Secondary species: 



29. An alga {Nostoc verrucosum) . Abun- 



dant. 



30. Curly pondweed {Potamogeton per- 



foliatus richardsonii) . Common. 



31. Variable pondweed {Potamogeton lieter- 



ophyllus).* Mature fruit; common. 



120368°— 20— Bull. 794 5 



32. Sago pondweed {Potamogeton pecti- 



natus).* Mature fruit; sparse. 



33. Small pondweed {Potamogeton pusil- 



lus).* Winter buds present. 



34. Spike rush {Eleocharis, probably aci- 



cularis).* Common. 



35. Water smartweed {Polygonum amphibi- 



um).* 



36. Coontail {Ceratophylhim demersum).* 



37. Bladderwort {Utricularia vulgaris).* 



