26 BI'LLETIX 1091, U. S. DEPAETZMEXT OF AGRICULTURE. { ^^'^t'^xrf ^i. 



Table 3. — List of uU plant species found in 22 dens of Dipodomys spectabilis. 

 on the United States Range Reserve, near the Santa Rita Mountains, Ariz., 



with approximate total ireights. 



Geasses. 



Grams. 



Ai'i.stida bi'omoides ( six-weeks needlegrass ) 536 



Aristida divaricata (Humboldt ueedlegrassi 9,412 



Aristida scabra (rougb needlegi'ass » 344 



Bouteloua aristidoides (six-weets grama) 3,093 



Bouteloua radicosa (grama) 1,269 



Bouteloua eriopoda (black grama) Tr. 



Bouteloua rothrockii (seeds. 8,495: crowns, 3.517 grams) (crowfoot 



grama) 12, 012 



Fe.stuca octoflora (fescue grass t 70 



Panicum arizonicum (Arizona panic-grass) 11 



Panicum hallli (Hall panic-grass) Tr. 



Pappaphorum wrightii Tr. 



Tridens pulchella Tr. 



Valota saccharata Tr. 



Other Plants. 



Alternanthera repens Tr. 



Anisolotus trispermus (bird's-foot trefoil) 186 



Aplopappus gracilis 1,030 



Apodanthera undulata (melon loco) 55 



Astragalus nuttallianus (milk vetcb » 630 



Ayenia microphylla Tr. 



Boerhaavia wrightii 885 



Chamaecrista leptadenla (partridge pea ( 5 



Echlnocactus wislizeni (vi.snaga) 5 



Eriogonum polycladon 35 



Eschscholtzia mexicana (Mexican poppy i 2.50 



Gaertneria tenuifolia (franseria) Tr. 



Collomia gracilis (false gilia) Tr. 



Heterotheca subaxillaris Tr. 



Kallstroemia laetevirens Tr. 



Lupinus sparsiflorus (lupine) Tr. 



Martynia altlieaefotia (small devirs-borns) 12 



MoUugo verticillata (carpetweed) 324 



Oenothera primiverus (evening primrose) 15 



Opuntia discata (prickly pear) 15 



Loeflingia pusilla — Tr. 



Lepidium lasiocarpum (peppergrass) Tr. 



Plantago ignota (plantain) 818 



Polygala puberula (milkwort) Tr. 



Portulaca suffrutescens (purslane) Tr. 



Prosopis velutina (mesquite) 1,570 



Sida diffusa (spreading sida) 30 



Solanum elaeagnifolium (742 fruits) (tronipillo, prickly solanum) 156 



Puffballs and fleshy fungi (undetermined) 12 



Total species, exclusive of fungi. 41. 



