62 BULLETIN 794, U. S. DEPARTMENT OF AGRICULTURE. 
FLOATING PLANTS. 
22. Big duckweed (Spirodela polyrhiza). 
Abundant. 
23. Small duckweed (Le?nna minor). Abun- 
dant. 
24. Star duckweed (Lemna trisulca). 
Abundant. 
Wild-duck foods. — Plants in the above list which have considerable value as 
food for wild ducks are : Nos. 1, 3, 5, 9, 10, 15, 16, 22, 23, and 24 ; those of less 
importance are: Nos. 2, 6, 7 (17), 11, 12, 13, 14, 18, 19, and 20; the remainder 
are of no known value. 
HAY LAKE, CHERRY COUNTY. 
September 14, 1915. 
Description. — No marsh. Lake well filled with submerged vegetation ; bottom 
mostly mucky ; depth, 6 feet. No inlet or outlet. 
Distribution of Vegetation, 
shore plants. 
In addition to others listed for near-by waters, there are : 
1. Switchgrass (Panicum virgatum) .* Ma- I 2. White wreath-aster (Aster multiflorus) .* 
ture fruit. Flowers. 
SEMISUBMERGED PLANTS. 
Dominant: 
3. Big bulrush (Scirpus occidentalis) . 
Secondary species: 
4. Cat-tail (Typha latifolia) . 
5. Spike rush (Eleocharis acuminata). 
SUBMERGED PLANTS. 
Dominant: 
6. Sago pondweed (Potamogetjn pecti- 
natus).* 
Secondary species: 
7. Curly pondweed (Potamogeton per- 
foliatus richardsonii) . 
8. Illinois pondweed (Potamogeton illino- 
ensis). 
9. Eelgrass pondweed (Potamogeton com- 
pre8sus). 
10. Bushy pondweed (Xajas flexilis) . Com- 
mon. 
Wild-duck foods. — Plants in the above list which have considerable value 
as food for wild ducks are: Nos. 3, 6, and 10; those of less importance are: 
Nos. 1, 5, 7, 8, and 9 ; the remainder are of no known value. 
SOUTH CODY LAKE, CHERRY COUNTY. 
September 18-19, 1915. 
Description. — Marshy at east and west ends; considerable open water: 
average greatest depth, 4 to 5 feet; bottom generally mucky. Inlet from the 
west ; overflow into North Cody Lake during high water. 
