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. 
Distribution of Vegetation, 
shore plants. 
1. Cord-grass (Spartina michauxiana) . 
Sparse. 
2. Switchgrass (Panicum virgatum). 
Abundant. 
3. Bog reedgrass (Calamagrostis inew- 
pansa) . Common. 
4. Satin grass (Muhlenbergia foliosa). 
Common. 
5. Straw sedge (Cyperus strigosus). Abun- 
dant. 
6. Spike rush (Eleocharis acicularis). 
Common on wet shore and shallow 
water. 
7. Sedge (Carex 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 ramosissi- 
mum).* 
13. Water - hemp (Acnida tuberculata) . 
Sparse. 
14. Dragon-head (Dracocephalum virginia- 
num). Common. 
15. Marsh mint (Stachys palustris). 
16. Blue lobelia (Lobelia syphilitica). 
Sparse. 
17. Burweed (Iva xanthifolia) .* Common; 
flowers. 
18. Sunflower (Helianthus annum) .* 
Sparse. 
MARSH PLANTS. 
19. Marsh fern (Dryopteris thelypteris). 
Common. 
20. Bur reed (Sparganium eurycarpum). 
Sparse. 
21. Wapato (Sagittaria latifolia). Abun- 
dant. 
22. Reed (Phragmites communis). Abun- 
dant. 
23. Rice cut-grass (Homalocenchrus ory- 
zoides).* Common. 
24. Big bulrush (Scirpus occidentalis) . 
Abundant. 
25. Spike rush (Eleocharis acicularis). 
Common. 
26. Spike rush (Eleocharis acuminata). 
27. Sedge (Carex utriculata). Common. 
28. Tall dock (Rumex altissimus). Sparse. 
29. Watercress (Sisymbrium nasturtium- 
aquaticum).* Sparse. 
30. Touch - me - not (Impatiens biflora).* 
Sparse. 
31. Water hemlock (Cicuta maculata). 
Sparse. 
SEMISUBMERGED PLANTS- 
Dominants: 
32. Wild rice (Zizanla palustris) * A field 
of wild rice on north side about 11 
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 (Sagittaria latifolia). Com- 
mon. 
SUBMERGED 
Dominant: 
39. Coontail (Ceratophyllum demersum). 
Secondary species: 
40. Water moss ( Drepanocladus sp.). Com- 
mon. 
41. Small pondweed (Potamogeton pusil- 
lus). Common. 
42. Eelgrass pondweed (Potamogeton com- 
pressus). Common. 
43. Sago pondweed (Potamogeton pectina- 
tus). Abundant. 
44. Curly pondweed (Potamogeton per- 
foliate richardsonii) .* Common. 
35. Reed (Phragmites communis). Com- 
mon. 
36. Spike rush (Eleooharis acuminata). 
Common. 
37. Bristly sedge (Carex comosa) .* Sparse; 
mature fruit. 
38. Water hemlock (Cicuta maculata). 
PLANTS. 
45. Illinois pondweed (Potamogeton UUno- 
ensis).* Common. 
46. Bushy pondweed (Najas flexilis). Com- 
mon. 
47. Water smartweed (Polygonum am- 
phibium). Common. 
48. White water crowfoot (Batrachium di- 
varicatum). Common. 
49. Water milfoil (Myriophyllum spica- 
tum ) . 
50. Spatterdock (Nymphaea advcna). Com- 
mon. 
51. Bladdprwort (Utricularia vulgaris). 
Common. 
