Baptisia australis, commonly known as Blue Wil Indigo or Blue False Indigo, is a herbaceous perennial in the pea family. It is native to much of the central and eastern North America and is particularly common in the Midwest, but it has also been introduced well beyond its natural range. The plant may attain a height of 1.5 meteres (5 feet) and a width of 1 metre (3.2 feet), but most often it is encountered at about 1 metre tall (3.2 feet) with a 0.6 metre spread (2 feet). It is well known in gardens due to its attractive pea-like, deep blue flowers that emerge on spikes in the late spring and early summer. It requires little maintenance and is quite hardy. The seed pods are popular in flower arrangements, which also contribute to its popularity in cultivation. Several American Indians tribes made use of the plant for a variety of purposes. The Cherokees used it as a source of blue dye, a practice later copied by European settlers. They also would use the roots in teas as a purgative or to treat tooth aches and nausea, while the Osage made an eyewash with the plant.