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The star-like flowers are a heavenly shade of light blue and the foliage is an attractive bright green. No other native plant in Illinois resembles this species. The closest relatives of Bluestar in Illinois are Apocynum cannabinum (Common Dogbane) and Apocynum androsaemifolium (Spreading Dogbane). These latter two species have white to pinkish white flowers that are bell-shaped and smaller in size. While Bluestar has alternate leaves, Common Dogbane and Spreading Dogbane have opposite leaves. Sometimes other Amsonia spp. (Bluestars) are occasionally cultivated in gardens. They differ from the Bluestar that is described here by the shapes of their flowers and leaves. Another common name of Amsonia tabernaemontana is Blue Dogbane.