Amsonia is a genus of flowering plants in the dogbane family, Apocynaceae, first described as a genus in 1788. It is native primarily to North America with one species in East Asia and another in the eastern Mediterranean. It was named in honor of the American physician John Amson. Members of the genus are commonly known as bluestars.

1. Species

2. Amsonia ciliata Walter fringed bluestar – SE US, S Great Plains

3. Amsonia elliptica (Thunb. ex Murray) Roem. & Schult. Japanese bluestar – China, Japan, Korea

4. Amsonia fugatei S.P.McLaughlin San Antonio bluestar – New Mexico

5. Amsonia grandiflora Alexander Arizona bluestar – Arizona, Sonora, Durango

6. Amsonia hubrichtii Woodson Hubricht's bluestar – Arkansas, Oklahoma

7. Amsonia illustris Woodson Ozark bluestar – Mississippi Valley, also Nevada

8. Amsonia jonesii Woodson Jones' bluestar – Arizona, New Mexico, Utah, Colorado

9. Amsonia kearneyana Woodson Kearney's bluestar – Baboquivari in Pima Co. in Arizona

10. Amsonia longiflora Torr. tubular bluestar – Arizona, New Mexico, Texas, Coahuila

11. Amsonia ludoviciana Vail Louisiana bluestar – Louisiana, Mississippi, Georgia

12. Amsonia orientalis Decne. European bluestar – Greece, Turkey

13. Amsonia palmeri A.Gray Palmer's bluestar – Arizona, New Mexico, Texas, Sonora, Chihuahua

14. Amsonia peeblesii Woodson Peebles' bluestar – Arizona

15. Amsonia repens Shinners creeping bluestar – E Texas, SW Louisiana

16. Amsonia rigida Shuttlw. ex Small stiff bluestar – from Georgia to Louisiana

17. Amsonia tabernaemontana Walter eastern bluestar – S + C + E United States

18. Amsonia tharpii Woodson feltleaf bluestar – W Texas, SE New Mexico

19. Amsonia tomentosa Torr. & Frém. woolly bluestar – SW US; Chihuahua

References