| 0 | PI 60358 | | Helleborus foetidus L. | Provence-Alpes-Côte-d’Azur, France | | | Historic | 1924 | COLLECTED | | | | | | | | 1661774 | PI 60358 |
| 1 | PI 53054 | | Helleborus foetidus L. | Copenhagen, Denmark | | | Historic | 1921 | COLLECTED | | | | | | | | 1652357 | PI 53054 |
| 2 | PI 53101 | | Helleborus foetidus L. | Zuid-Holland, Netherlands | | | Historic | 1921 | COLLECTED | | | | | | | | 1652408 | PI 53101 |
| 3 | PI 53146 | | Helleborus foetidus L. | Uppsala län, Sweden | | | Historic | 1921 | COLLECTED | | | | | | | | 1652504 | PI 53146 |
| 4 | PI 7837 | | Helleborus niger L. | Thüringen, Germany | | | Historic | 1901 | COLLECTED | | | | | | | | 1546399 | PI 7837 |
| 5 | NA 88880 | 'Black Tie Affair' | Helleborus sp. | Michigan, United States | NA | | Not Available | 2024 | DEVELOPED | PRE 03/2024 | | | | | Cultivar | Full name as recorded at the U.S. National Arboretum: Helleborus 'Black Tie Affair' (WEDDING PARTY Series) | 2190942 | NA 88880 |
| 6 | NA 88887 | 'Shotgun Wedding' | Helleborus sp. | Michigan, United States | NA | | Not Available | 2024 | DEVELOPED | PRE 03/2024 | | | | | Cultivar | Full name as recorded at the U.S. National Arboretum: Helleborus 'Shotgun Wedding' (WEDDING PARTY Series) | 2190949 | NA 88887 |
| 7 | NA 85059 | 'Cotton Candy' | Helleborus ×hybridus hort. ex Voss | | NA | | Not Available | 2023 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Helleborus x hybridus 'Cotton Candy' (WINTER JEWELS Series). Tentatively identified as 'Cotton Candy', this is thought to have been planted by someone connected with the DePrete bench in the Azalea Collections; it has been there for a number of years as of 2018, and is being kept as an attractive plant in the location in spite of its undocumented origins and unauthorized planting. | 2153997 | NA 85059 |
| 8 | NA 79885 | NA 79885 | Helleborus thibetanus Franch. | | NA | | Not Available | 2023 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Helleborus thibetanus. Seedlings of NA 74425 (Helleborus thibetanus /marbled leaves/), originally from Chen Yi Nursery. | 2151965 | NA 79885 |
| 9 | OPGC 5068 | ME2016-007 | Helleborus orientalis Lam. | Georgia | OPGC | | Not Available | 2016 | COLLECTED | 5/25/2016 12:00:00 AM | Samtskhe-Javakheti Region, Borjomi Municipality, northeast of village Kortaneti. | 41.89968330, 43.45320000 | 780 | Deciduous woodland. Growing in association with Carpinus orientalis, Rubus sp., Corylus avellana, Poa bulobosa var. vivipara, Sambucus ebulus. | Wild material | | 1946886 | OPGC 5068 |
| 10 | NA 83796 | NA 83796 | Helleborus orientalis Lam. | | NA | | Not Available | 2016 | | | | | | | Wild material | Full name as recorded at U.S. National Arboretum: Helleborus orientalis. | 2153385 | NA 83796 |
| 11 | NA 83752 | NA 83752 | Helleborus foetidus L. | | NA | | Not Available | 2016 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Helleborus foetidus. Obtained for the Friendship Garden renovation. | 2153360 | NA 83752 |
| 12 | NA 83218 | (Shirley's Snow Stars strain) | Helleborus ×hybridus hort. ex Voss | | NA | | Not Available | 2016 | | | | | | | | | 1950795 | NA 83218 |
| 13 | NA 83089 | 'Snow Love' | Helleborus sp. | | NA | | Not Available | 2016 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Helleborus 'Snow Love'. Obtained for the renovation of the Friendship Garden. | 2153231 | NA 83089 |
| 14 | NA 82608 | 'Golden Lotus' | Helleborus ×hybridus hort. ex Voss | | NA | | Not Available | 2014 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Helleborus x hybridus 'Golden Lotus'. | 2152982 | NA 82608 |
| 15 | NA 80316 | (Shirley's Snow Stars strain) | Helleborus ×hybridus hort. ex Voss | | NA | | Not Available | 2011 | | | | | | | | | 1952126 | NA 80316 |
| 16 | NA 81267 | 'COSEH 790' | Helleborus sp. | | NA | | Not Available | 2011 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Helleborus 'COSEH 790' SHOOTING STAR (GOLD COLLECTION Series). | 2152447 | NA 81267 |
| 17 | NA 81268 | 'COSEH 810' | Helleborus sp. | | NA | | Not Available | 2011 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Helleborus 'COSEH 810' MERLIN (GOLD COLLECTION Series). | 2152448 | NA 81268 |
| 18 | NA 79874 | 'COSEH 710' | Helleborus sp. | | NA | | Not Available | 2011 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Helleborus 'COSEH 710' PINK FROST (GOLD COLLECTION Series). | 2151958 | NA 79874 |
| 19 | NA 79875 | 'Onyx Odyssey' | Helleborus ×hybridus hort. ex Voss | | NA | | Not Available | 2011 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Helleborus x hybridus 'Onyx Odyssey'. | 2151959 | NA 79875 |
| 20 | NA 80252 | 'COSEH 700' | Helleborus sp. | | NA | | Not Available | 2009 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Helleborus 'COSEH 700' CINNAMON SNOW (GOLD COLLECTION Series). | 2152092 | NA 80252 |
| 21 | NA 80253 | 'COSEH 710' | Helleborus sp. | | NA | | Not Available | 2009 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Helleborus 'COSEH 710' PINK FROST (GOLD COLLECTION Series). | 2152093 | NA 80253 |
| 22 | NA 75496 | (D.L.C. Hybrids) | Helleborus ×hybridus hort. ex Voss | | NA | | Not Available | 2006 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Helleborus x hybridus BRANDYWINE (D.L.C. Hybrids). | 2150392 | NA 75496 |
| 23 | NA 75497 | 'Pine Knot Select' | Helleborus ×hybridus hort. ex Voss | | NA | | Not Available | 2006 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Helleborus x hybridus 'Pine Knot Select'. | 2150393 | NA 75497 |
| 24 | NA 75262 | 'Christmas Carol' | Helleborus niger L. | | NA | | Not Available | 2006 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Helleborus niger 'Christmas Carol'. | 2150305 | NA 75262 |
| 25 | NA 74730 | 'Red Lady' | Helleborus ×hybridus hort. ex Voss | | NA | | Not Available | 2005 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Helleborus x hybridus 'Red Lady'. | 2150112 | NA 74730 |
| 26 | NA 74732 | 'Blue Lady' | Helleborus ×hybridus hort. ex Voss | | NA | | Not Available | 2005 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Helleborus x hybridus 'Blue Lady'. | 2150113 | NA 74732 |
| 27 | NA 74733 | 'White Lady Spotted' | Helleborus ×hybridus hort. ex Voss | | NA | | Not Available | 2005 | | | | | | | Cultivar | Full name as recorded at U.S. National Arboretum: Helleborus x hybridus 'White Lady Spotted'. | 2150114 | NA 74733 |
| 28 | NA 74425 | (marbled leaves) | Helleborus thibetanus Franch. | | NA | | Not Available | 2005 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Helleborus thibetanus (marbled leaves). | 2150006 | NA 74425 |
| 29 | NA 74223 | GE-2004-067 | Helleborus orientalis Lam. | | NA | | Not Available | 2004 | COLLECTED | | Adjara, near Keda | 41.59560000, 41.94129000 | 255 | Forest edge with Picea orin eta lis and Castanea sativa. | | | 1927310 | NA 74223 |
| 30 | CHEL 1 | GE-2004-067 | Helleborus orientalis Lam. | Georgia | | | Historic | 2004 | COLLECTED | 08/15/2003 | Adjara province, near Keda. | 41.59555556, 41.94111111 | 255 | | Wild material | | 1668542 | CHEL 1 |
| 31 | NA 67691 | QLG 064 | Helleborus thibetanus Franch. | Shaanxi Sheng, China | NA | | Not Available | 1996 | COLLECTED | 10/18/1996 | Foping Nature Preserve, Yue Ba Forest Station, Bei Gou Kou | 33.56666667, 107.80000000 | 1232 | large colonies in the shade beneath deciduous shrubs, one meter above the stream | Wild material | | 1579517 | NA 67691 |
| 32 | NA 63148 | NA 63148 | Helleborus orientalis Lam. | | NA | | Not Available | 1991 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Helleborus orientalis. | 2147068 | NA 63148 |
| 33 | NA 61892 | (dark selection) | Helleborus orientalis Lam. | | NA | | Not Available | 1990 | | | | | | | Clone | Full name as recorded at U.S. National Arboretum: Helleborus orientalis (dark selection). | 2146875 | NA 61892 |
| 34 | NA 59554 | NA 59554 | Helleborus orientalis Lam. | | NA | | Not Available | 1987 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Helleborus orientalis. | 2146588 | NA 59554 |
| 35 | NA 58927 | NA 58927 | Helleborus orientalis Lam. | | NA | | Not Available | 1987 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Helleborus orientalis. Over time, this accession has become heavily augmented through seedling production in areas where it has been planted. If any original plants remain, they are vastly outnumbered by their seed-produced offspring. -SBL | 2146517 | NA 58927 |
| 36 | NA 26290 | NA 26290 | Helleborus orientalis Lam. | | NA | | Not Available | 1964 | | | | | | | Cultivated material | Full name as recorded at U.S. National Arboretum: Helleborus orientalis. | 2144025 | NA 26290 |