NEBRASKA WILD-DUCK FOODS. 



75 



TRAINOR LAKES. GARDEN COUNTY. 



September 30, 1915. 



Description. — North Trainor Lake, small; South Trainor Lake, about half 

 open water ; the two connect by a small stream. Fresh water ; bottom mostly 

 sandy ; mucky in part of marsh area ; average greatest depth, 3 to 4 feet. 



Distribution of Vegetation. 



SHORE plants. 



Typical meadow of grasses, sedges, rushes, mints, etc., as listed for neighbor- 

 ing lakes. 



SEMISUBMERGED PLANTS. 



Dominant : 



1. Tule (Scirpus validus). 

 Secondary species: 



2. Horsetail (Eqiiisetum sp.) 



3. Cat-tail {Typha latifolia). Common. 



4. Bur reed (Sparganium eurycarpum). 



Sparse. 



5. Water plantain {Alisma- subcordatum) . 



Common. 



6. Wapato (Sagittaria latifolia). Common. 



7. Cord-grass (Spartina gracilis). Common. 



8. Reed (Phragmitea communis). Common. 



9. Three-square (Scirpus americanus). 



Common. 



10. Spike rush (Eleocharia acicularis) . 



11. Spike rush {Eleocharis, probably 



glaucescens ) . 



12. Sedge {Carex utriculata) .* 



13. Water smartweed (Polygonum amphi- 



Mum). 



14. Water hemlock (Cicuta maculata). 



Rare. 

 — . Other grasses, etc., of shore, growing 

 in shallow water. 



SUBMERGED PLANTS. 



Dominants : 



15. Sago pondweed (Potamogeton pecti- 



natus) . 



16. Bladderwort (Utricularia vulgaris).* 



With winter buds. 

 Secondary species: 



17. Musk grass (Chara sp.).* Common. 



18. Small pondweed (Potamogeton pusil- 



lus) .* Winter buds ; common. 



19. Widgeon grass (Ruppia occidentalis) .* 



Common. 



20. Spike rush (Eleocharis acicularis).* 



Common. 



21. Spike rush (Eleocharis, probably 



glaucescens). 



22. Water smartweed (Polygonum am- 



phibium). Common. 



23. Small duckweed (Lemna 



Common. 



24. Star duckweed (Lemna trisulca) . 



Common. 



FLOATING PLANTS 

 minor) . 



25. Water-meal (Wolffla punctata). 

 mon. 



Com- 



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

 food for wild ducks are : Nos. 1, 6, 15, 17, 18, 19, 23, and 24 ; those of less im- 

 portance are: Nos. 4, 5, 7, 9, 10 (20), 11 (21), 12, 13 (22), and 25; the remainder 

 are of no known value. 



PETERSON LAKE NO. 1. GARDEN COUNTY. 



October 2, 1915. 



Description.— 'iBottom mucky ; average greatest depth, 2 feet. No inlet or 

 outlet. 



Distribution of Vegetation. 



SHORE plants. 



Grasses, etc., as listed for neighboring lakes. 



