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Sand-bur (Cenchrus tribuloides). 
This grass occurs in great abundance in sandy soil in the Missouri Valley and, aves 
stock eat it while young, it is regarded as a = weed on account of the“ burs” 
which are formed by the 8 spikelet 
Sand Vetch ( Vicia villosa). 
This vetch is one of the hardiest legumes that has been cultivated for forage in the 
Northwest. It endures drought perfectly, grows rapidly, yields well, and is in 
condition to use at a time when the native forage is likely to be short on account 
of the dry weather of July and August. Its feeding value is very high and the 
forage in the fresh or dry state is greedily eaten by stock. At Brookings, Mel- 
lette, and elsewhere in South Dakota, as well as in North Dakota, it has given the 
best results. For summer soiling, for which it is most valuable, it may be sown 
in April or May, using a bushel to a bushel and a half of seed per acre with a 
like quantity of oats or other small grain. It should be fed in connection with 
plenty of prairie grass, grain straw, and like forage in order that all of the pro- 
tein may be utilized. Green Corn, Cane, or Kaffir Corn can be fed with it to good 
vetch is the scarcity of seed andthe difficulty in savingit inany large quantity, 
due to the habit of the plant of ripening seed in such small amounts at a time 
and continuing to bud and blossom until it freezes up in the fall. 
Savastana odorata. (See Sweet-grass.) 
Schedonnardus paniculatus. (See Wild Crab-grass.) 
Scirpus atrovirens pallidus. (See Meadow-rush.) 
Scirpus fluviatilis. (See River Club-rush.) 
Scirpus lacustris. (See Great Bulrush.) 
Scirpus robustus. (See Sea Club-rush.) 
Scolochloa arundinacea. (See Reed Fescue.) 
Sea Club-rush (Scirpus robustus). 
More or less abundant in brackish water in both the Dakotas. What has been said 
regarding the uses of River Club-rush will apply equally well to this species. 
Sedges (Carex spp.). 
There is a great variety of sedges growing in this region. Though most of them 
are too rare to be of much economic importance, there are a few which add mate- 
rially to the native forage in certain localities. Giant Sedge (Carex aristata) and 
Upright Sedge (C. str € ant a dase prs of hay and pasturage re wet, 
boggy lands. Straw-colored straminea) and its relatives, with Sil- 
very-topped Sedge + Bese siccata) and Browictopped Sedge (€. 3 add 
more or less to the forage of ier meadow nt ry uplands Dwarf 
the season before the true grasses have developed sufficiently for grazing 
Sheep's Fescue ( Festuca ovina). 
This is one of the most valuable of the Fesenes for this region. Certain forms of 
this species are a to me Black — region of South Dakota. Sheep’s 
Fescue thrives on sandy so tures 
particularly those in which sheep are allowed to run. It is very hardy and 
grows well from seed. Red Fescue (Festuca rubra) has also been cultivated more 
or less in the Dakotas, and in some respects is even more desirable than Sheep's 
Fescue. It forms a better sod and is a stronger grower. 
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