| 0 | NA 84199 | NA 84199 | Xanthorhiza simplicissima Marshall | | NA | | Not Available | 2023 | | | | | | | Uncertain improvement status | Full name as recorded at U.S. National Arboretum: Xanthorhiza simplicissima. Old plant growing in Fern Valley bed 17; according to Angela Magnan this appears to be morphologically distinct from NA 13572, which appears on old map #6 in the vicinity (but across the stream in present-day bed FV-13). Form received: unknown propagule type. | 2153567 | NA 84199 |
| 1 | NA 72899 | NA 72899 | Xanthorhiza simplicissima Marshall | | NA | | Not Available | 2023 | | | | | | | Uncertain improvement status | Full name as recorded at U.S. National Arboretum: Xanthorhiza simplicissima. Form received: unknown propagule type. | 2149372 | NA 72899 |
| 2 | WLP 165 | NACPEC19-048 | Xanthorhiza simplicissima Marshall | Georgia, United States | NA | | Not Available | 2019 | COLLECTED | 09/14/2019 | Walker County; Lula Lake Land Trust: South bank of Rock Creek, below bridge from Loop Trail | 34.92141100, -85.38034000 | 427 | Riparian zone, wet slope of creek, moist, sandy banks | Wild material | | 2110477 | WLP 165 |
| 3 | NA 86234 | NACPEC19-013 | Xanthorhiza simplicissima Marshall | Kentucky, United States | NA | | Not Available | 2019 | COLLECTED | 09/08/2019 | Menifee County; ; Daniel Boone National Forest: Red River Gorge Area: 1/2 mile west of where Sheltowee Trace crosses Red River, on north bank of Red River. | 37.82308000, -83.62718000 | 241 | Mixed mesophytic forest on north bank of river, growing in alluvial, sandy soil. | | Seeds collected from one plant. Five herbarium specimens collected; photographed. DNA sample collection number: DENG8213. | 2109142 | NA 86234 |
| 4 | NA 83897 | PCCKY16-024 | Xanthorhiza simplicissima Marshall | Kentucky, United States | NA | | | 2016 | COLLECTED | 09/27/2016 | Cumberland Falls State Park, Cumberland Falls Visitor Center. Beach north of visitor center outlook trail, boulders north of large sycamore with exposed root flare and hole in trunk base. | 36.84200000, -84.34200000 | 252 | Beach, with boulders. | Wild material | | 1952452 | NA 83897 |
| 5 | NA 83920 | NA 83920 | Xanthorhiza simplicissima Marshall | Kentucky, United States | NA | | Not Available | 2016 | COLLECTED | 09/28/2016 | Cumberland Falls State Park; Cumberland Falls Trail #2 (Cumberland River Trail) at river's edge. | 36.83800000, -84.33200000 | 267 | River's edge below Juniperus virginiana and above rock. | | | 1953245 | NA 83920 |
| 6 | NA 82224 | NA 82224 | Xanthorhiza simplicissima Marshall | | NA | | Not Available | 2014 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Xanthorhiza simplicissima. | 2152857 | NA 82224 |
| 7 | WLP 1941 | RL 08156 | Xanthorhiza simplicissima Marshall | | NA | | | 2008 | COLLECTED | PRE 10/15/2008 | South Carolina, Oconee County, West of Highway 107, at Burrell Ford, east side of river, near bridge. | | | | Wild material | | 1896115 | WLP 1941 |
| 8 | NA 78026 | NA 78026 | Xanthorhiza simplicissima Marshall | Alabama, United States | NA | | Not Available | 2008 | COLLECTED | 09/17/2008 | Along Little Ugly Creek, tributaty to the Cahaba River, on dirt road off of Cahaba River Drive near confluence of creek and river. | | | Rich deciduous forest at base of slope at roadside. | Wild material | | 1952729 | NA 78026 |
| 9 | WLP 1940 | RL 08047 | Xanthorhiza simplicissima Marshall | | NA | | | 2008 | COLLECTED | PRE 09/08/2008 | South Carolina, Pickens County, Along Rocky Fork adjacent to Highway 11. | | | | Wild material | | 1896061 | WLP 1940 |
| 10 | NA 72090 | NA 72090 | Xanthorhiza simplicissima Marshall | Virginia, United States | NA | | Not Available | 2002 | COLLECTED | 08/22/2001 | Henry County,Virginia trial below Philkpot Dam along the Smith river | 36.78194444, -80.03055556 | 260 | Growning in part sun with, aspect north, soil: deep organic litter. | Wild material | | 1643592 | NA 72090 |
| 11 | Ames 26064 | D1996-0928 | Xanthorhiza simplicissima Marshall | West Virginia, United States | | | Historic | 2000 | COLLECTED | PRE 10/01/1996 | Along New River, near Hawks Nest State Park, Fayette County. | | | Wooded streambanks. | Wild material | | 1599989 | Ames 26064 |
| 12 | NA 52307 | NA 52307 | Xanthorhiza simplicissima Marshall | | NA | | Not Available | 1983 | | | | | | | | | 1952188 | NA 52307 |
| 13 | NA 13572 | NA 13572 | Xanthorhiza simplicissima Marshall | | NA | | Not Available | 1959 | | | | | | | Uncertain improvement status | Full name as recorded at U.S. National Arboretum: Xanthorhiza simplicissima. PO # SF 44-ARS-175050 | 2143520 | NA 13572 |
| 14 | NA 89205 | NA 89205 | Xanthorhiza simplicissima Marshall | North Carolina, United States | NA | | Not Available | 1942 | DONATED | 06/25/1942 | | | | | Uncertain improvement status | Plants arrived in the root balls of Rhododendron vaseyi, NA 2579, from North Carolina; noted on Freeman's 1953 checklist (National Arboretum Contribution No. 1) with the following entry: "Spreading as if natural from azalea clumps introduced from North Carolina." These are certain to be the same plants found growing in the woodland north of Rhododendron Road to the west of the old pond (more a swamp, at least now), where many planted native azaleas still persist. NA 2579 may also be present in that area (to be confirmed later). | 2195729 | NA 89205 |