70 
BULLETIN 794, U. S. DEPARTMENT OF AGRICULTURE. 
GIMLET LAKE, GARDEN COUNTY. 
September 24, 1915. 
Description. — Lake well filled with vegetation. Small amount of open water: 
average greatest depth Si feet; bottom mostly mucky. No inlet or outlet. 
Distribution of Vegetation. 
SHORE PLANTS. 
1. Arrow-grass (Triglochin maritima).* 
Mature fruit ; common. 
2. Switchgrass {Panicum virgatum) . Com- 
mon. 
3. Barbed witchgrass {Panicum barbi- 
pulcinatum). Sparse. 
4. Wild rye (Elymus canadensis). Com- 
mon. 
5. Cord-grass (Spartina gracilis). Com- 
mon. 
6. Saltgrass (Distichlis spicata). Sparse. 
7. Bog reedgrass (Calamagrostis inex- 
pansa). Abundant. 
8. Satin grass (Ifuhlenbergia foliosa). 
Common. 
9. Sedge (Cyperus speoiosus). Abundant. 
10. Sedge (Care a* diandra teretluscula) . 
Common. 
11. Sedge (Carex haydcni).* 1 Common. 
12. Sedge (Carex vulpinoidea) .* Flowers; 
sparse. 
13. Rush (Juncus balticus) . Abundant. 
14. Rush (Juncus torreyi).* Abundant. 
15. Rush (Juncus dudleyi).* Common. 
16. Water smartweed (Polygonum am- 
phibium) .* Common. 
17. Ragweed (Ambrosia elatior). Common. 
18. Bur marigold (Bidens laevis). Com- 
mon. 
19. Sunflower (Helianthus annuus). 
Sparse. 
20. White wreath-aster (Aster multiflorus). 
Sparse. 
SEMISUBMERGED PLANTS. 
Dominant : 
21. Tule (Scii-pus validus).* Mature fruit. 
Secondary species: 
A number of plants listed under shore 
vegetation grow in shallow water in 
addition to the following : 
22. Cat-tail (Typha latifolia). Common. 
23. Bur reed (Sparganium eurycarpum). 
24. Water plantain (Alisma subcordatum) . 
Common. 
25. Wapato (Sayittaria latifolia). Com- 
mon. 
Cord-grass (Spartina gracilis). 
20 
27. Reed (Phragmites communis) * 
28. Big bulrush (Scirpus occidentalis) * 
Scarce. 
29. Water pepper (Polygonum punctatum) . 
Common. 
Water smarts eed (Polygonum am- 
phibium)* Flowers to mature fruit; 
common. 
Curly dock (Rumex crispus). Sparse. 
Water hemlock (Cicuta maculata). 
Willow aster (Aster salicifolius). 
Common. 
30 
SUBMERGED PLANTS. 
Dominants: 
34. Sago pondweed (Potamogeton pecti- 
natus) .* Mature fruit. 
35. Coontail (Ceratophyllum demersum).* 
Secondary species: 
36. Water moss (Drcpanocladus sp.). 
Common. 
37. Bushy pondweed (Xajas flexilis). 
Sparse. 
38. Water smartweed (Polygonum amphib- 
ium). Common. 
39. Bladderwort (Utricularia vulgaris). 
Sparse. 
FLOATING PLANTS. 
42. Water-meal (Wolffia punctata) .* Abun- 
dant. 
40. Small duckweed (Lemna minor).* 
41. Star duckweed (Lemna trisulca).' 
Abundant. 
Wild-duck foods. — Plants in the above list which have considerable value as 
food for wild ducks are : Nos. 21, 28, 34, 35, 37, 40, 41. and 42 ; those of less 
importance are: Nos. 1, 2, 3 ? 5 (26), 6, 9. 10, 11. 12, 16 (30, 38), 18, 23, 24, 25, 
and 29 : the remainder are of no known value. 
1 Mr. G. P. Van Eseltine, who identified this specimen, notes that it represents an 
apparently undescribed form, of which he has seen specimens elsewhere, but which until 
named may be conveniently classed with its nearest relative, haydeni. 
