Genus Amsonia is a group of perennials that are native to North America. This group of plants is commonly known as blue star, and it is often used for landscaping purposes. There are several other names that can be used as synonyms for the genus Amsonia. Some of the most common synonyms include Hubertia, Stenolobium, Fraxinella, and Aristea. These names have been used historically to describe plants that are similar to the blue star in terms of their physical appearance, habitat, and growing conditions. No matter which synonym you choose, you can be sure that they are all referring to the same group of beautiful and useful perennials.