Threatened species, or those at the limit of their biogeographic range include Stephanomeria runcinata, Atriplex powellii, Orobanche ludoviciana, A. suckleyi, Oryzopsis micrantha, Lupinus pusillus, Plantago elongata, Muhlenbergia racemosa, Erigonium cernuum and Antennaria dimorpha.    From Wordnik.com.  [Dinosaur Provincial Park, Canada] Reference

(Oryzopsis hymenoides), purslane (Portulaca), sand dropseed.    From Wordnik.com.  [Tseh So, a Small House Ruin, Chaco Canyon, New Mexico :] Reference

(Agropyron smithii), sacaton (Sporobolus), and sand bunchgrass (Oryzopsis hymenioides).    From Wordnik.com.  [Tseh So, a Small House Ruin, Chaco Canyon, New Mexico :] Reference