ISTEBRASKA WILD-DUCK FOODS. 



69 



SUBMERGED PLANTS. 



Dominant: 



13. Sago pondweed (Potamogeton pectina- 



tus) .* The only submerged plant 

 in open water of east half of lake. 



Secondary species: 



14. Floating pondweed {Potamogeton na- 



tans ) . * 



15. Small pondweed (Potamogeton ptisil- 



lus). Sparse. 



16. Spike rush (Eleocharis, probably aoi- 



culari-s). 



17. Water smartweed (Polygonum ampM- 



tiiim). 



18. Water milfoil (Myriophyllum spica- 



tum ) . Sparse. 



19. Bladderwort (Utricularia vulgaris). 



Eare. 



20. 



Big duckweed 

 Sparse. 



FLOATING PLANTS. 



{Spirodela polyrMza) . I 21. Star duckweed (Lemna trisulca) . Rare. 



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

 food for wild ducks are : Nos. 1, 5, 13, 15, 20, and 21 ; those of less importance 

 are : Nos. 3, 4, 6, 8, 11, 14, 16, and 17 ; the remainder are of no known value. 



MOFFITT LAKE. GARDEN COUNTY. 



September 23, 1915. 



Description. — Grazed to shore line on east side; submerged vegetation very- 

 scarce and in poor condition. Water very alkaline; average greatest depth, 5 

 feet; hard sand bottom. No inlet or outlet. 



Distribution or Vegetation. 



SHORE plants. 



1. Saltgrass (Distichlis spicata).* Abun- 



dant. 



2. Cord-grass {Spartina gracilis).* Ma- 



ture fruit ; common. 



3. Wild rye (Elymus canadensis).* Ma- 



ture fruit ; common. 



4. Barbed witchgrass (Panicum bariipul- 



vinatum) .* Immature fruit; scarce. 



5. Switchgrass (Panic-urn virgatum) .* Ma- 



ture fruit ; common. 



6. Slender wheat-grass (Agropyron tene- 



rum,).* Mature fruit; common. 



7. Three-square (Scirpus americanus ) .* 



Abundant. 



8. Spike rush (Eleocharis palustris).* 



Common. 



9. Sedge (Carex diandra) .* Mature fruit; 

 common. 



10. Rush (Juncus balticus).* Common. 



11. Prairie gentian (Eustor/ia- russellia- 



num).* Mature fruit; scarce. 



12. Purple foxglove (Oerardia besseyana) .* 



Mature fruit ; sparse. 



13. Ragweed (Amlirosia elatior) .* Flow- 



ers ; common. 



14. HunQower (Heliantlius annuus) .* Flow- 



ers ; sparse. 



15. White wreath-aster ( Aster multifiorus).* 



Flowers ; sparse. 



semisubmerged plants. 



DomAnant: 



16. Three-square (Scirpus americanus). 

 Secondary species: 



17. Cord-grass (Spartina gracilis). 



Tule (Scirpus validus). 

 Rush (Juncus halticus). 



Rare. 



submerged plants. 



Dominant: 

 20. Sago pondweed (Potamogeton pectina- 

 tus). The only submerged plant. 



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

 food for wild ducks are : Nos. 18 and 20 ; those of less importance are : Nos. 1, 

 2 (17), 4, 5, 7 (16), 8, and 9; the remainder are of no known value. 



