Bouteloua warnockii

An uncommon grass very similar to the widespread & abundant Bouteloua curtipendula, but differing in having narrower leaves, purple (rather than yellow or red) anthers, and occurring primarily on limestone or gypsum, where cutripendula generally doesn't grow.

Plant habit on Bishop's Cap, 10/16/05.

Mature spikelets on Bishop's Cap, 10/16/05.