Stiff Blue-eyed Grass-Sisyrinchium demissum

This bright blue flower growing along a streambank caught my attention. The six petals were a hint that it's in the Iris Family (Iridaceae). This is stiff blue-eyed grass (Sisyrinchium demissum), and it grows in many of the desert southwest states. The plant looks very much like a grass until it flowers, hence the common name.

For more info about stiff blue-eyed grass, click here.