United States, Texas, Pecos, In old trap just S of house and red barn at upper edge of clay flat on NW side of Diamond Y Draw, ca. 1.1-1.2 airmiles WSW of bridge on St. Rt. 18, 2.5 airmiles NNE of Diamond Y Spring. Diamond Y Spring Preserve. Diamond Y Spring Quadrangle.
31.03333 -102.90528
Common in small patch of aberrant dense herbaceous vegetation among large mesquite on deep nonsaline soil in valley flat between gentle slopes of Cretaceous limestone. Associates include Aphanostephus sp., Aristida longiseta, Artemisia ludoviciana, Bouteloua curtipendula, Clematis drummondii, Conyza coulteri, Ditaxis humilis, Flourensia cernua, Gaillardia suavis, Glandularia sp., Lycium pallidum, Marrubium vulgare, Nyctaginea capitata, Pappophorum vaginatum, Prosopis glandulosa, Psilostrophe sp., Ratibida columnifera, Rhynchosida physocalyx, Salvia reflexa, Setaria sp., Sida abutifolia, Solanum elaeagnifolium, Sorghum halepense, Tridens albescens.