NEBRASKA WILD-DUCK FOODS. 
43 
MARSH LAKE, BROWN COUNTY. 
August 12-13, 1915. 
Description. — Fresh-water lake, well filled with vegetation. Little open water, 
average greatest depth 6 to 7 feet, bottom mucky except at east end. No inlet 
or outlet. 
Distribution of Vegetation. 
shore plants. 
A mixture in which no species are dominant is found in a narrow zone of wet 
meadow (2 to 5 rods) except on east side. 
10. 
Cord-grass (Spartina michauxiana) .* 
Flowers. 
Switchgrass (Panicum virgatum).* 
Hair-grass (Agrostis hyemalis) .* 
Redtop (Agrostis alba).* 
Bog reedgrass (Calamagrostis inex- 
pansa).* 
Couch-grass (Agropyron repens). 
Reed canary-grass (Phalaris arundina- 
cea).* 
Straw sedge (Cyperus strlgosus).* 
Mature fruit. 
Shining sedge {Cyperus rivularis) .* 
Immature fruit. 
Three-way sedge (Dulichium arundina- 
ceum).* Flowers. 
11. Sedge (Carex vulpinoidea) .* Mature 
fruit. 
12. Sedge (Carex scoparia).* Mature 
fruit. 
13. Rush (Juncus nodosus).* 
14. Rush (Juncus canadensis).* Abun- 
dant ; flowers to immature fruit. 
15. Rush (Juncus marginatus) .* Mature 
fruit. 
16. Rush (Juncus dudleyi) * Capsules 
empty. 
17. Water hemlock (Cicuta maculata).* 
Flowers. 
18. Marsh mint (Stachys palustris) .* 
Flowers. 
19. Water marigold (Bidens beckii) .* 
SEMISUBM ERGED PLANTS. 
Dominants: 
20. Big bulrush (Scirpus occidentalis). 
21. Spikerush (Eleocharis acuminata). 
22. Water smartweed (Polygonum amphib- 
ium) . 
Secondary species: 
23. Western water plantain (Alisma bre- 
vipes).* Flowers to immature fruit. 
24. Wapato (Sagittaria latifoUa). 
25. Crested wapato (Sagittaria cristata). 
26. Reed (Phragmites communis). 
27. Rush (Juncus balticus).* Flowers. 
SUBMERGED PLANTS. 
Dominants: 
28. Curly pondweed (Potamogeton perfoli- 
atus richardsonii) . 
Secondary species: 
29. Sago pondweed (Potamogeton pectina- 
tus).* 
30. Eelgrass pondweed (Potamogeton com- 
pressus). 
31. Small pondweed (Potamogeton pusil- 
lus) * Flowers. 
32. Floating pondweed (Potamogeton na- 
tans ) . 
33. White water crowfoot (Batracliium cir- 
cinatum).* 
34. Bladderwort (Utricularia vulgaris).* 
35. Water milfoil (Myriophyllum spica- 
tum). 
FLOATING PLANT. 
36. Star duckweed (Lemna trisulca).* I 
Wild-duck foods. — Plants in the above list which have considerable value as 
food for wild ducks are : Nos. 20, 24, 29, 31, and 36 ; those of lesser importance 
are : Nos. 1, 2, 8, 9, 11, 12, 19, 21, 22, 28, 30, 32, 33, and 34 ; the remainder are of 
no known value. 
