56 



BULLETIN 794, U. S. DEPARTMENT OF AGHICULTURE. 



SUBMERGED PLANTS. 



Dominants: 



21. Coontail (Ceratophyllum demersum) . 



22. Spatterdock (Nymphaea advena) .* 



Seedlings. 

 Secondary species: 



23. Musk grass (Chara sp.).* Abundant. 



24. Water moss {Drepanocladus sp.). Abun- 



dant. 



25. Sago pondweed {Potamogeton pectinor^ 



tus). Abundant. 



26. Eelgrass pondweed {Potamogeton com- 



pressus). Common. 



27. Small pondweed (Potamogeton pusil- 



lus). Common. 



28. Illinois pondweed (Potamogeton illi- 



noensis). 



29. Floating pondweed (Potamogeton nu- 



tans) . 



30. Variable pondweed (Potamogeton heter- 



ophyllus) . 



31. Curly pondweed (Potamogeton per- 



foliatus richardsonii) . 



32. Bushy pondweed (Najas flesoilis). Com- 



mon. 



33. Water smartweed (Polygonum ampht- 



Mum). Abundant. 



34. White water crowfoot (Batrachium, di- 



varicatum) . 



35. Spatterdock (^2/»]p7iaea- ar7re?ia). Com- 



mon. 



36. Water milfoil (My riophyllum spicatum) . 



Abundant. 



37. Bladderwort (Utricularia vulgaris). 



Abundant. 



FLOATING PLANTS. 



38. Big duckweed (Spirodela polyrhiza). 



39. Small duckweed (Lemna minor). 



40. Star duckweed (Lemna trisulcm) . 

 mon. 



Com- 



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

 food for wild ducks are : Nos. 2 (16), 3, 11, 13, 21, 23, 25, 27, 30, 32, 38, 39, and 

 40; those of less importance are: Nos. 1, 4, 5, 7, 10 (33), 15, 17, 20, 22 (35), 

 26, 28, 29, 31, 34, and 36 ; the remainder are of no known value. 



SWEETWATER LAKES. CHERRY COUNTY, 



September 6, 1915. 



Description. — Marshy at west end. Well filled with submerged vegetation. 

 Average greatest depth about 3 to 3* feet ; bottom mostly sandy. Overflow from 

 one lake to another during high water. 



Distribution of Vegetation. 



SHORE PLANTS. 



Typical mixture of grasses, etc., as listed for other lakes, 

 shore line. 



MARSH PLANTS. 



Grazed mostly to 



1. Water plantain (Alisma subcordatum) . 



Common. 



2. Wapato (liagittaria latifoUa) . 



3. Reed (Phragmites communis). 



4. Big bulrush (Scirpus occidentalis) . 



5. Spike rush (Eleocharis acuminata). 



6. Rush (Juncus torreyi) .* 



7. St. John's-wort (Hypericum' puncta- 



tum).* Mature fruit. 



8. Willow herb (Epilobium lineare).* 



9. Water hemlock (Cicuta maculata). 



10. Water hemlock (Cicuta hulMfera).* 



11. Skullcap (Scutellaria galericulata) .* 



Flowers. 



12. Purple boneset (Eupatorium purpu- 



reum).* Flowers. 



13. Sticktight (Biden-s trichosperma) .* 



Flowers. 



14. Willow aster (Aster salicif alius) .* 



Flowers. 



15. Sunflovfer (Helianthus annuus).* Flow- 



ers. 



SEMISUBMERGEU PLANTS. 



Dominants : 



16. Wapato (Sagittaria latifolia). 



17. Spike rush (Eleocharis acuminata). 

 Secondary species: 



18. Water plantain (Alisma subcordatum).* 



19. Cord-grass (Spartina michauxiana) . 



20. Big bulrush (8ei7'pus occidentalis) . 



21. Water smartweed (Polygomim amphi- 



l)ium). 



