Bouteloua curtipendula

A creeping grass that forms a coarse mat of green foliage with two foot spikes of little oat flowers and fruits. This grass grows in much of the Americas. \"Plains and Rocky hills\" is what Abrams describes as its habitat, but it grows from Maine to the California desert. While it doesn\'t grow in most of California, it grows only along the desert edges, centered on Riverside County. Why does it grow in Texas, Maine, Iowa, Canada, much of the plains states, and only grow in a 100 mile strip along our desert edge? Ecology is wonderful!