We do use it as a substitute for turf in shade areas where turf doesn’t grow here in Texas

Great article about horseherb, Bobby! Looks like a fine solution for turf….

I googled central american lawn weeds and found a possible canidate: Calyptocarpus vialis, the only species of this central American genus. It is ‘preadapted’ to be a “troublesome lawn weed” (Correll and Johnston) in that it is a perennial herb “with weak often sprawling stems” that allow the plant to avoid the mower. Texas A&M dept of Biology. http://www.greatstems.com/2009/10/love-it-or-leave-it-horseherb.html