Amsonia

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.^[2][3] It was named in honor of the American physician John Amson.^[4] Members of the genus are commonly known as bluestars.^[5]

Species^[2][6][3]

1. Amsonia ciliata Walter – fringed bluestar – SE US, S Great Plains
2. Amsonia elliptica (Thunb. ex Murray) Roem. & Schult. – Japanese bluestar – China, Japan, Korea
3. Amsonia fugatei S.P.McLaughlin – San Antonio bluestar – New Mexico
4. Amsonia grandiflora Alexander – Arizona bluestar – Arizona, Sonora, Durango
5. Amsonia hubrichtii Woodson – Hubricht's bluestar – Arkansas, Oklahoma
6. Amsonia illustris Woodson – Ozark bluestar – Mississippi Valley, also Nevada
7. Amsonia jonesii Woodson – Jones' bluestar – Arizona, New Mexico, Utah, Colorado
8. Amsonia kearneyana Woodson – Kearney's bluestar – Baboquivari in Pima Co. in Arizona
9. Amsonia longiflora Torr. – tubular bluestar – Arizona, New Mexico, Texas, Coahuila
10. Amsonia ludoviciana Vail – Louisiana bluestar – Louisiana, Mississippi, Georgia
11. Amsonia orientalis Decne. – European bluestar – Greece, Turkey
12. Amsonia palmeri A.Gray – Palmer's bluestar – Arizona, New Mexico, Texas, Sonora, Chihuahua
13. Amsonia peeblesii Woodson – Peebles' bluestar – Arizona
14. Amsonia repens Shinners – creeping bluestar – E Texas, SW Louisiana
15. Amsonia rigida Shuttlw. ex Small – stiff bluestar – from Georgia to Louisiana
16. Amsonia tabernaemontana Walter – eastern bluestar – S + C + E United States
17. Amsonia tharpii Woodson – feltleaf bluestar – W Texas, SE New Mexico
18. Amsonia tomentosa Torr. & Frém. – woolly bluestar – SW US; Chihuahua