Prosopis velutina 190
Mollugo verticillata (pure) 90
Anisolotus trispermus (mixed, but mostly of this genus) 50
Solanum elaeagnifolium (12 fruits) 2
                                                        Per cent. 
Mollugo verticillata (inseparable) 50 }
Bouteloua rothrockii 1 }
Bouteloua aristidoides 10 }
Lepidium lasiocarpum Tr. }
Polygala puberula Tr. }
Ayenia microphylla 2 }
Portulaca suffrutescens 1 } 400
Aplopappus gracilis Tr. }
Alternanthera repens 1 }
Tridens pulchella 1 }
Plantago ignota 33 }
Panicum hallii Tr. }
Fleshy fungi (puffballs) 2
          
                                                     —–­
      Total 734

Fifteen species represented in addition to the fleshy fungi.  No perceptible grass growth from the summer rains here, therefore dependent on a wide variety of scattering plants.

DEN 6.

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.
          
                                                     -----
      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.