Western Spiderwort
It is a plant in the dayflower family, Commelinaceae. It is common and widespread across the western Great Plains of the United States
Like in a few other species of Tradescantia, the cells of the stamen hairs of Western spiderwort are normally colored blue, but when exposed to neutron radiation or other forms of ionizing radiation, the cells mutate and change color to pink. Thus the plant can be used as a bioassay for radiation.