This alliance consists of areas of sparse (generally <10% cover) annuals and stoloniferous grass such as Chamaesyce carunculata, Helianthus neglectus, Helianthus petiolaris, Heliotropium convolvulaceum, Heliotropium racemosum, Mentzelia sp., Panicum havardii, Polanisia jamesii, and Psoralidium lanceolatum. This alliance occur within the Chihuahuan Desert on dunes and sandsheets.