NEBRASKA 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 pusil- 
lus). Sparse. 
16. Spike rush (Eleocharis, probably aci- 
cularis). 
17. Water smartweed (Polygonum amphi- 
bium). 
18. Water milfoil (Myriophyllum spica- 
tum). Sparse. 
19. Bladderwort (Utricularia vulgaris). 
Rare. 
FLOATING PLANTS. 
20. Big duckweed (Spirodela polyrhiza) . I 21. Star duckweed (Lemna trisulca) . Rare. 
Sparse. 
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 of 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 barbipul- 
vinatum).* Immature fruit; scarce. 
5. Switchgr ass (Panicum 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 (Eustoma russellia- 
num).* Mature fruit ; scarce. 
Purple foxglove (Gerardia besseyana) .* 
Mature fruit ; sparse. 
Ragweed (Ambrosia elatior).* Flow- 
ers ; common. 
Sunflower (Helianthus annuus) .* Flow- 
ers ; sparse. 
White wreath-aster (Aster multiflorus) .* 
Flowers ; sparse. 
12 
13 
14 
15 
SEMISUBMERGED PLANTS. 
Dominant: 
16. Three-square (Scirpus americanus). 
Secondary species: 
17. Cord-grass (Spartina gracilis). 
18. Tule (Scirpus validus). 
19. Rush (Juncus balticus). 
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. 
