October 17, 1918. Mixed type, partially denuded, no growth from summer
rains. Sandy soil.
Species stored. Grams.
Bouteloua rothrockii (crowns) (heads 1 to 2 per cent) 1,435
Bouteloua rothrockii (heads and crowns, about 50 per cent of each) 325
Bouteloua rothrockii (with small percentage of crowns) 315
Boerhaavia wrightii (with a few grass crowns) 150
Prosopis velutina 90
Solanum elaeagnifolium (3 fruits) Tr.
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Total 2,315
Four species represented. Count of 100 grams of stored _Bouteloua_
crowns gives 1,700, or 17 crowns per gram. At this rate there were at
least 27,000 crowns stored in this burrow. If a density of 250 plants to
the square yard be assumed (a high estimate) these crowns represent the
total _B. rothrockii_ on 104 square yards of range surface. Further
examination of the vicinity of this den showed that the surrounding area
was not completely cleared, but was devoid of _B. rothrockii_, while
still having _B. eriopoda_ with crowns undisturbed.