66 



BULLETIN 794, U. S. DEPARTMENT OF AGRICULTURE. 



FLOATING PLANT. 



38. Star duckweed (Lemna trisulca).* I 

 Abundant. | 



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

 food for vi'ild ducks are : Nos. 20, 24, 31, 32, 33, 36, and 38 ; those of less impor- 

 tance are : Nos. 1, 3, 4, 5, 7, 22, 23, 25, 26, 27 (35), 28, 30, and 34; the remainder 

 are of no known value. 



WHITE WILLOW LAKE, CHERRY COUNTY. 



October 10, 1915. 

 Description. — No marsh. Grazed to shore on south and west sides. Well 

 filled with vegetation. Fresh water; depth 6 to 7 feet; bottom mostly sandy. 

 No inlet or outlet. 



DiSTEIBUTION OF VEGETATION. 

 SHOEE PLANTS. 



-. Typical wet-meadow plants. 



1. Saltgrass (Disticlilis spicata). Abun- 



dant. 



2. Western wheat-grass (Agropyron 



smithii). Common. 



3. Switchgrass (Panicum virgatum). 



Abundant. 



4. Bog reedgrass (Calamagrostis inex- 



pansa).* Mature fruit. 



5. Fragrant sedge (Cyperus inflexus). 



Abundant. 



6. Stra-v* sedge (Cyperus strigosus).* 



Mature fruit. 



7. Shining sedge (Cyperus rivularis).* 



Mature fruit. 



8. Spike rush (Eleocharis palustris) .* 



Mature fruit. 



9. Spike rush (Eleocharis acicularis) . 



Abundant. 



10. Three-way sedge (Dulichium arundi- 



naceum ) . Common. 



11. Sedge (Carex vulpinoidea) .* 



12. Sedge (Carea? scoparia).* Mature fruit. 



13. Rush (J uncus marginatus) .* 



14. Rush (Juncus canadensis). Abundant. 



15. Willow (Salix). Sparse. 



16. Golden dock (Rumex persicarioides) . 



Common. 



17. Bushy knotweed (Polygonum ramosissi- 



mum) . Sparse. 



18. Water hemlock (Cicuta bulhifera) . 



Sparse. 



19. Bugleweed (Lycopus uniflorus). Com- 



mon. 



20. Ragweed (Ambrosia elatior). Common. 



21. Bushy goldenrod (Euthamia gramini- 



folia). Common. 



22. Bur marigold (Bidens laevis). 



SEMISUBMERGED PLANTS. 



Dominant : 



23. Tule (Scirpus validus). 

 Secondary species: 



24. Wapato (Sagittaria latifolia). 



25. Cord-grass (Spartina michauxiana) .* 



Mature fruit ; common. 



26. Bog reedgrass (Calamagrostis inex- 



pansa). 



SUBMERGED PLANTS. 



Bominants: 



27. Small pond'veed (Potamogeton pilsil- 



lus).* Mature fruit; winter buds. 



28. Water milfoil (Myriophyllum spica- 



tum). 

 Secondary species: 



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



30. Water moss (Drepanocladus sp.). 



31. Curly pondweed (Potamogeton per- 



foliatus richardsonii) .* Abundant. 



32. Variable pondweed (Potamogeton heter- 



ophyllus). 



33. Sago pondweed (Potamogeton pectina- 



tus).* Common. 



34. Bushy pondweed (Najas flexilis). Rare. 



35. Spike rush (Eleocharis, probably aci- 



cularis ) . Common. 



36. Water smartweed (Polygonum amphi- 



hium) . Common. 



37. Bladderwort (Utricularia vulgaris). 



Common. 



FLOATING PLANTS. 



38. Butterflywort (Riccia natans).* I 40. Star duckweed (Lemna trisulca).* 



39. Big duckweed (Spirodela polyrhima) . I Abundant. 



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

 food for wild ducks are: Nos. 23, 24, 27, 29, 32, 33, 34, 39, and 40; those of 

 less importance are : Nos. 1, 3, 5, 6, 7, 8, 9, 11, 12, 25, 28, 31, 35, and 36 ; the 

 remainder are of no known value. 



