| 0 | NA 85894 | 'Storm Cloud' | Amsonia tabernaemontana Walter | | NA | | Not Available | 2019 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Amsonia tabernaemontana 'Storm Cloud'. | 2154486 | NA 85894 |
| 1 | NA 85807 | 'Storm Cloud' | Amsonia tabernaemontana Walter | | NA | | Not Available | 2019 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Amsonia tabernaemontana 'Storm Cloud'. | 2154418 | NA 85807 |
| 2 | OPGC 7222 | NV052-639 | Amsonia tomentosa Torr. & Frém. | Nevada, United States | OPGC | | | 2018 | | | | | | | Wild material | | 1965169 | OPGC 7222 |
| 3 | NA 86584 | 'Blue Ice' | Amsonia sp. | | NA | | Not Available | 2017 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Amsonia 'Blue Ice'. | 2154795 | NA 86584 |
| 4 | NA 83736 | 'Blue Ice' | Amsonia sp. | | NA | | Not Available | 2016 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Amsonia 'Blue Ice'. Obtained for the Friendship Garden renovation. | 2153344 | NA 83736 |
| 5 | NA 83737 | NA 83737 | Amsonia hubrichtii Woodson | | NA | | Not Available | 2016 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Amsonia hubrichtii. Obtained for the Friendship Garden renovation. | 2153345 | NA 83737 |
| 6 | NA 80882 | 'Short Stack' | Amsonia tabernaemontana Walter | | NA | | Not Available | 2012 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Amsonia tabernaemontana 'Short Stack'. | 2152282 | NA 80882 |
| 7 | NA 79189 | 'Short Stack' | Amsonia tabernaemontana Walter | | NA | | Not Available | 2010 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Amsonia tabernaemontana 'Short Stack'. | 2151666 | NA 79189 |
| 8 | OPGC 4414 | 394730 | Amsonia tomentosa Torr. & Frém. var. stenophylla Kearney & Peebles | Utah, United States | OPGC |  | Not Available | 2009 | COLLECTED | 07/12/2007 | | | 1326 | Stabilised sand dunes. Associated with Eriogonium microthecum, E. corymbosum, Artemisia filifolia, Aristida longiseta, Ephedra torreyana, Astragalus sp, Cryptantha flava, Abronia fragrans, Achnatherum hymenoides, Polomintha incana etc. | Wild material | | 1826892 | OPGC 4414 |
| 9 | NA 87104 | (A. hubrichtii and A. hubrichtii hybrids, mixed) | Amsonia hybr. | | NA | | Not Available | 2006 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Amsonia (A. hubrichtii and A. hubrichtii hybrids, mixed). The large, well-photographed mass planted in front of the Capitol Columns monument was not documented officially until 2017, when it was surmised to be mostly or entirely comprised of NA 75492 from North Creek Nursery; however, other qualifiers of that accession have been uniformly A. hubrichtii, and this mass is a very heterogeneous mixture of what appear to be pure A. hubrichtii as well as hybrids with much broader leaves and varying flower color, size, presentation, and overall plant size and height (these hybrids possibly involving A. tabernaemontana, A. rigida, or some other species). The hybrids appear to be the same age as the other plants as of 2022, and may then date to the original planting circa 2006 following Angela Palmer's design, but it is possible that they have interbred and reseeded at the Arboretum over time. -SBL | 2155145 | NA 87104 |
| 10 | NA 75664 | 'Short Stack' | Amsonia tabernaemontana Walter | | NA | | Not Available | 2006 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Amsonia tabernaemontana 'Short Stack'. | 2150463 | NA 75664 |
| 11 | NA 75492 | NA 75492 | Amsonia hubrichtii Woodson | | NA | | Not Available | 2006 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Amsonia hubrichtii. | 2150388 | NA 75492 |
| 12 | NA 74530 | NA 74530 | Amsonia hubrichtii Woodson | | NA | | Not Available | 2005 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Amsonia hubrichtii. | 2150059 | NA 74530 |
| 13 | NA 74494 | 'Short Stack' | Amsonia tabernaemontana Walter | | NA | | Not Available | 2005 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Amsonia tabernaemontana 'Short Stack'. | 2150041 | NA 74494 |
| 14 | NA 74435 | 'Blue Ice' | Amsonia sp. | | NA | | Not Available | 2005 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Amsonia 'Blue Ice'. [Probably now hopelessly mixed with NA 74453, also Amsonia 'Blue Ice' but from another source, yet planted in the same bed. -SBL] | 2150008 | NA 74435 |
| 15 | NA 74436 | 'Short Stack' | Amsonia tabernaemontana Walter | | NA | | Not Available | 2005 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Amsonia tabernaemontana 'Short Stack'. | 2150009 | NA 74436 |
| 16 | NA 74453 | 'Blue Ice' | Amsonia sp. | | NA | | Not Available | 2005 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Amsonia 'Blue Ice'. Name Change due to a data entry error. [Probably now hopelessly mixed with NA 74435, also Amsonia 'Blue Ice' but from another source, yet planted in the same bed. -SBL] | 2150014 | NA 74453 |
| 17 | NA 62474 | NA 62474 | Amsonia elliptica (Thunb.) Roem. & Schult. | | NA | | Not Available | 1990 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Amsonia elliptica. Form received: division. | 2146974 | NA 62474 |
| 18 | NA 60250 | NA 60250 | Amsonia elliptica (Thunb.) Roem. & Schult. | | NA | | Not Available | 1988 | | | | | | | Uncertain improvement status | Full name as recorded at U.S. National Arboretum: Amsonia elliptica. | 2146666 | NA 60250 |
| 19 | NA 58230 | NA 58230 | Amsonia ciliata Walter | | NA | | Not Available | 1986 | | | | | | | Uncertain improvement status | Full name as recorded at U.S. National Arboretum: Amsonia ciliata. | 2146454 | NA 58230 |
| 20 | NA 56205 | (dwarf selection) | Amsonia tabernaemontana Walter | | NA | | Not Available | 1985 | | | | | | | Clone | Full name as recorded at U.S. National Arboretum: Amsonia tabernaemontana (dwarf selection). Dwarf selection. | 2146159 | NA 56205 |
| 21 | NA 55677 | NA 55677 | Amsonia hubrichtii Woodson | | NA | | Not Available | 1985 | | | | | | | Uncertain improvement status | Full name as recorded at U.S. National Arboretum: Amsonia hubrichtii. | 2146108 | NA 55677 |
| 22 | NA 42280 | NA 42280 | Amsonia tabernaemontana Walter | | NA | | Not Available | 1978 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Amsonia tabernaemontana. Form received: division. | 2144951 | NA 42280 |