United States, Texas, Travis, Walnut Creek Metropolitan Park. Pflugerville West Quad.
Common along all the creek drainages. Associates include Echinochloa colona, Echinochloa muricata, Paspalum urvillei, Paspalum diliataum, Cyperus odoratus, Cyperus ochraceus, Eleocharis montividensis, Justicia americana and Ludwigia ocotvalvis.