62 BULLETIN 194, U. S. DEPARTMENT OF AGRICULTURE. 



FLOATING PLANTS. 



22. Big duckweed (Spirodela polyrMsta). 



Abundant. 



23. Small duckweed (Lenina 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, 18, 14, IS, 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- 

 ture fruit. 



2. White wreath-aster (Aster nultiflorus). 

 Flowers. 



SEMISUBMERGED PLANTS. 



Dominant: 

 3. Big bulrush (Scirpus occidentalis). 



Secondary species: 



4. Cat-tail (Typha latifolia). 



5. Spike rush (Eleocharis acum,inata) . 



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- 



10. Bushy pondweed (Najas 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. 



