68 
BULLETIN 794, U. S. DEPARTMENT OF AGRICULTURE. 
SEMISUBMERGED PLANTS. 
Dominant: 
1. Tule (Scirpus validus). 
Secondary species: 
2. Cat-tail (Typha latifolia). Sparse. 
3. Bur reed (Sparganium eurycarpum) . 
Sparse. 
4. Water plantain (AUsma subcordatum) . 
Common. 
5. Wapato (Sagittaria latifolia) . Common. 
6. Cord - grass (Spartina michauxiana) . 
Abundant. 
7. River bulrush (Scirpus fuviatilis) . 
Sparse. 
8. Three-square (Scirpus americanus). 
Sparse. 
9. Water smartweed (Polygonum amphi- 
bium). Common. 
10. Water hemlock (Cicuta maculata), and 
others listed under shore vegetation 
for neighboring lakes growing in shal- 
low water. 
SUBMERGED PLANTS. 
Dominants: 
11. Sago pondweed (Potamogeton- pecti- 
natus). 
12. Water milfoil (Myriophyllum spica- 
tum). 
Secondary species: 
13. Variable pondweed (Potamogeton heter- 
ophyllus). 
14. Small pondweed (Potamogeton pusil- 
lus). Common. 
15. Spike rush (Eleocharis acicularis). 
Common. 
16. Water smartweed (Polygonum amphi- 
bium). Sparse. 
17. Bladderwort (Utricularia vulgaris). 
Sparse. 
FLOATING PLANTS. 
18. Butterflywort (Riccia natans). 
19. Big duckweed (Spirodela polyrhiza 
Common. 
20. Star duckweed (Lemna trisulca). Com- 
mon. 
~\Yild-duck foods. — Plants in the above list which have considerable value as 
food for wild ducks are : Nos. 1, 5, 7, 11, 13, 14, 19, and 20 ; those of less im- 
portance are: Nos. 3, 4, 6, 8, 9 (16), 12, and 15; the remainder are of no known 
value. 
SILVER LAKE, CHERRY COUNTY. 
October 17, 1915. 
Description. — Marsh and most of the other vegetation at west end of lake; 
water clearer at west end of marsh than in the open where there is an alkaline 
appearance ; bottom sandy at east half ; mucky in west ; average greatest depth 
3 to 4 feet. Outlet to the west ; since the lake is being drained, probably some 
current ; no inlet. 
Distribution of Vegetation. 
SHORE PLANTS. 
As for neighboring lakes. 
SEMISUBMERGED PLANTS. 
Dominant: 
1. Tule (Scirpus validus).* Mature fruit, 
only thing growing in open water. 
Secondary species: 
2. Cat-tail (Typha latifolia). 
3. Bur reed (Sparganium eurycarpum \ . 
4. Water plantain (AUsma subcordatum). 
5. Wapato (Sagittaria latifolia). 
6. Cord - grass (Spartina michauxiana). 
Common. 
7. Reed (Phragmites communis). Com- 
mon. 
8. Three -square (Scirpus americanus). 
Common. 
9. Willow (Salix). 
10. Curly dock (Rum-ex crispus). Sparse. 
11. Water smartweed (Polygonum amphi- 
bium). 
12. Water hemlock (Cicuta maculata). 
Sparse. 
