50 



BULLETIN" 794, U. S. DEPARTMENT OF AGRICULTURE. 



HACKBERRY LAKE, CHERRY COUNTY. 



August 27, 1915. 

 Description. — Lake well filled with submerged vegetation. Open water exten- 

 sive ; average greatest depth, 5 to 6 feet ; bottom mostly mucky. No inlet or 

 outlet. 



DiSTEIBUTION OF VEGETATION. 

 SHORE PLANTS. 



1. Cord-grass (Spartina michauxiana) . 



Sparse. 



2. Switchgrass {Panicum virgatum,). 



Abundant. 



3. Bog reedgrass {Cala/magrostis inew- 



pansa) . Common. 



4. Satin grass (MuMentergla foliosa). 



Common. 



5. Straw sedge {Gyperus strigosus) . Abun- 



dant. 



6. Spike rush (Eleocharis aciculwris). 



Common on wet shore and shallow 

 water. 



7. Sedge (Car ex scoparia). 



8. Rush {Juncus torreyi). Common. 



9. Rush {Juncus marginatus). 



10. Richweed (Pilea pumila). Common. 



11. Heart's-ease (Polygonum pennsylvani- 



cum). Common. 



12. Bushy knotweed (Polygonum rwmosissi- 



mum).* 



13. Water - hemp (Acnida tuierculata) . 



Sparse. 



14. Dragon-head (Dracocephalum, virginia- 



num). Common. 



15. Marsh mint (Stachys palustris). 



16. Blue lobelia (LoheUa syphilitica). 



Sparse. 



17. Burweed (Iva xanthifoUa) .* Common ; 



flowers. 



18. Sunflower (Helianthus annuus).* 



Sparse. 



MARSH PLANTS. 



19. Marsh fern (Dryopteris thelypteris). 



Common. 



20. Bur reed (8pa/rganium eurycarpum). 



Sparse. 



21. Wapato (Sagittaria latifolia). Abun- 



dant. 



22. Reed (Phragmites com,munis). Abun- 



dant. 



23. Rice cut-grass (Homalocenchrus ory- 



isoides).* Common. 



24. Big bulrush (Scirpus occidentalis) . 



Abundant. 



25 



(Eleocharis acicularia). 



Spike rush 

 Common. 



26. Spike rush (Eleocharis acuminata). 



27. Sedge (Car ex utriculata). Common. 



28. Tall dock (Rumex altissimus) . Sparse. 



29. Watercress (Sisymhrium, nasturtium- 



aquaticum).* Sparse. 



30. Touch-me-not (Impatiens Mflora).* 



Sparse. 



31. Water hemlock (Cicuta maculata). 



Sparse. 



SEMISUBMERGED PLANTS. 



32 



Dominants : 

 Wild rice (Zizanla palustris).* A field 

 of wild rice on north side about li 

 miles long and from a few to several 

 rods wide. Some reed (Phragmites) 

 mixed with it. 



33. Big bulrush (Scirpus occidentalis).* 

 Secondary species: 



34. Wapato (Saglttaria latifolia). Com- 



mon, 



SUBMERGED 

 Dominant: 



39. Coontail (Ceratophyllum demersum). 

 Secondary species: 



40. Water moss (Drepanocladus sp.) . Com- 



mon. 



41. Small pondweed (Potamogeton puail- 



lus). Common. 



42. Eelgrass pondweed (Potamogeton com- 



pressus ) . Common . 



43. Sago pondweed (Potamogeton pectinor- 



tus). Abundant. 



44. Curly pondweed (Potamogeton per- 



foliatus richardsonii) ,* Common. 



35. Reed (Phragmites communis). Com- 



mon. 



36. Spike rush (Eleocharis acuminata). 



Common. 



37. Bristly sedge (Car-ea; comosa).* Sparse; 



mature fruit. 



38. Water hemlock (Cicuta maculata). 



PLANTS. 



45. Illinois pondweed (Potamogeton ilUno- 



ensis).* Common. 



46. Bushy pondweed (Najas flexilia) . Com- 



mon. 



47. Water smartweed (Polygonum am- 



phihium). Common. 



48. White water crowfoot (Batrachium di- 



varicatum). Common. 



49. Water milfoil (Myriophyllum spica- 



tum). 



50. Spatterdock (Nymphaea advena). Com- 



mon. 



51. Bladderwort (Utricularia vulgaris). 



Common. 



