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 8 feet ; bottom at 
east and west ends mucky, while the other portion is sandy. No inlet ; overflow 
into Willow Lake, during high water. 
DlSTEIBUTION OF VEGETATION. 
SHOKE PLANTS. 
1. Bur reed (Sparganium eurycarpum). 
Sparse. 
2. Arrow-grass (Triglochin maritima). 
Common on wet shore. 
3. Cord-grass (Spartina michauxiana) . 
Sparse. 
4. Switchgrass (Panicum virgatum) . 
Common. 
5. Hairy crabgrass (Panicum huachucae).* 
Common ; immature and mature 
fruit. 
6. Saltgrass (Distichlis spicata).* Abun- 
dant ; mature fruit. 
7. Squirrel-tail (Hordeum jubatum).* 
Abundant. 
8. Broom-grass (Andropogon furcatus).* 
Common. 
9. Dropseed (Sporobolus asperifolius).* 
Sparse. 
10. Bog reedgrass (Calamagrostis inex- 
pansa) . Common. 
11. Straw sedge (Cyperus 
Common. 
12. Spike rush (Eleocharis 
Common on wet shore. 
13. Sedge (Carex scoparia). 
14. Rush (Juncus balticus) .* 
wet shore. 
15. Rush (Juncus dudleyi). Common. 
16. Rush (Juncus marginatus) . 
17. Bushy knotweed (Polygonum ranu 
simum I.* Common. 
18. Heart's - ease (Polygonum 
vanicum). 
19. Richweed (Pilea pumila). 
20. Dragon-head (Dracoccphalum virgini- 
anum). 
21. Marsh mint (Stachys palustris) . 
22. Mint (Mentha cayiadensis) . 
strigosus) . 
acicularis) . 
Common on 
pennsyl- 
MARSH PLANTS 
Consisting largely of : 
23. Big bulrush (Scirpus occidentaUs) .* | 
Others are: 
24. Squirrel-tail (Hordeum jubatum). 
25. Saltgrass (Distichlis spicata). 
26. Bushy knotweed (Polygonum ramo- 
sissimum) .* 
SEMISTJBMEBGED PLANTS. 
Dominants: 
27. Spike rush (Eleocharis acuminata) . 
28. Big bulrush (Scirpus occidentaUs) . 
Secondary species: 
29. Wapato (Sagittaria latifolia). Sparse. 
30. Reed (Phragmites communis). Sparse. 
SUBMERGED PLANTS. 
Submerged vegetation is scattered and not abundant. 
Dominant: 
31. Sago pcndweed (Potamogeton pectina- 
tus). 
Secondary species: 
32. Eelgrass pondweed (Potamogeton com- 
pressus). Common. 
33. Small pondweed (Potamogeton pusil- 
lus). Common. 
34. Illinois pondweed (Potamogeton Uli- 
iioen*is). Not abundant. 
35. Bushy pondweed (Xajas flexills). 
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. 
120368°— 20— Bull. 794 4 
