Dwarf Blazing Star is a lovely native plant with delicate strap-like foliage topped by magenta-purple flower spikes in August and September. The shiny green leaves have an almost grass-like appearance. Blooming begins at the top of the flower stalk and progresses downward, butterflies and insects love the late season flowers. Native to the southern Appalachian Mountains and found in dry prairies and open glades. Due to its ability to adapt to harsh dry sunny conditions, Liatris microcephala is a good option for planting on a green roof.