| Ranunculaceae | |
Helleborus abchasicus
| A. Braun | Index Seminum (Berlin) : 14 | 1853 |
| Ranunculaceae | |
Helleborus abruzzicus
| M. Thomsen, McLewin & B. Mathew | Plantsman 5(4): 236–237 | 2006 |
| Ranunculaceae | |
Helleborus altifolius
| Steud. | Nomencl. Bot. (ed. 2) 1: 746 | |
| Ranunculaceae | |
Helleborus angustifolius
| Host | Fl. Austriac. 2: 90 | 1831 |
| Ranunculaceae | |
Helleborus antiquorum
| A. Braun | Index Seminum (Berlin) App.: 23 | 1853 |
| Ranunculaceae | |
Helleborus argutifolius
| Viv. | Fl. Cors. Prodr. 8 | 1824 |
| Ranunculaceae | |
Helleborus × ashwoodensis
| Grimshaw | Plantsman, n.s. 9(4): 230–231 | 2010 |
| Ranunculaceae | |
Helleborus atropurpureus
| Schult. | | |
| Ranunculaceae | |
Helleborus atrorubens
| Waldst. & Kit. | Descr. Icon. Pl. Hung. 3: 301 | 1812 |
| Ranunculaceae | ** |
Helleborus × ballardiae
| B. Mathew | Gardener's Guide Hellebores 124 | 1993 |
| Ranunculaceae | |
Helleborus biflorus
| hort. | Vilm. Blumengärtn. ed. 3 i: 25 | 1894 |
| Ranunculaceae | |
Helleborus bocconei
| Ten. | Corso Bot. Lez. 4(1): 459 | 1822 |
| Ranunculaceae | |
Helleborus caucasicus
| A. Braun | Index Seminum (Berlin) : 14 | 1853 |
| Ranunculaceae | |
Helleborus chinensis
| Maxim. | Trudy Imp. S.-Peterburgsk. Bot. Sada 11(1): 27 | 1889 |
| Ranunculaceae | ** |
Helleborus corsicus
| Willd. | Enum. Pl. (Suppl.) 40 | 1814 |
| Ranunculaceae | * |
Helleborus corsicus
| Willd. ex Mabille | Rech. Pl. Cors. 1: 7 | 1867 |
| Ranunculaceae | |
Helleborus croaticus
| Martinis | 1: 14 | 1973 |
| Ranunculaceae | |
Helleborus cyclophyllus
| Boiss. | Fl. Orient. 1: 61 | 1867 |
| Ranunculaceae | |
Helleborus dumetorum
| Waldst. & Kit. ex Willd. | Enum. Pl. 592 | 1809 |
| Ranunculaceae | ** |
Helleborus × ericsmithii
| B. Mathew | Gardener's Guide Hellebores 124 | 1988 |
| Ranunculaceae | |
Helleborus foetidus
| L. | Sp. Pl. 1: 558 | 1753 |
| Ranunculaceae | |
Helleborus guttatus
| A. Braun & F.W.H. Sauer | Index Seminum (Berlin) Append.: 23 | 1853 |
| Ranunculaceae | |
Helleborus hyemalis
| L. | Sp. Pl. 1: 557 | 1753 |
| Ranunculaceae | |
Helleborus intermedius
| Guss. | Pl. Rar. 224 | 1826 |
| Ranunculaceae | * |
Helleborus intermedius
| Host | Fl. Austriaca 2: 88 | 1831 |
| Ranunculaceae | |
Helleborus laxus
| Host | Fl. Austriaca 2: 89 | 1831 |
| Ranunculaceae | |
Helleborus lividus
| Aiton ex Curtis | Bot. Mag. 2: , t. 72 | 1789 |
| Ranunculaceae | |
Helleborus macranthus
| Freyn | Flora 64: 209 | 1881 |
| Ranunculaceae | |
Helleborus multifidus
| Vis. | Flora 12(1 Erg.): 13 | 1829 |
| Ranunculaceae | |
Helleborus niger
| L. | Sp. Pl. 1: 558 | 1753 |
| Ranunculaceae | |
Helleborus occidentalis
| Reut. | Bull. Soc. Bot. France 16(Bibl.): 53 | 1869 |
| Ranunculaceae | |
Helleborus odorus
| Waldst. & Kit. ex Willd. | Enum. Pl. 592 | 1809 |
| Ranunculaceae | |
Helleborus orientalis
| Lam. | Encycl. 3: 96 | 1789 |
| Ranunculaceae | |
Helleborus polychromus
| Kolak. | Zametki Sist. Geogr. Rast. 5: 7 | 1939 |
| Ranunculaceae | |
Helleborus purpurascens
| Waldst. & Kit. | Descr. Icon. Pl. Hung. 2: 105, t. 101 | |
| Ranunculaceae | |
Helleborus ranunculinus
| Sm. | Pl. Icon. Ined. 2: , t. 37 | 1790 |
| Ranunculaceae | |
Helleborus serbicus
| Adamović | Magyar Bot. Lapok 5: 221 | 1906 |
| Ranunculaceae | |
Helleborus siculus
| Schiffn. | Nova Acta Acad. Caes. Leop.-Carol. German. Nat. Cur. 56: 123 | 1890 |
| Ranunculaceae | |
Helleborus × sternii
| Turrill | Bot. Mag. 171: , t. 291 | 1957 |
| Ranunculaceae | |
Helleborus thibetanus
| Franch. | Nouv. Arch. Mus. Hist. Nat., sér. 2 8: 190 | 1886 |
| Ranunculaceae | |
Helleborus torquatus
| Archer-Hind | Garden (London, 1871-1927) 25: 184 | 1884 |
| Ranunculaceae | * |
Helleborus trifolius
| Mill. | Gard. Dict. (ed. 8) 4 | 1768 |
| Ranunculaceae | ! |
Helleborus trifolius
| L. | Sp. Pl. 1: 558 | 1753 |
| Ranunculaceae | |
Helleborus triphyllus
| Lam. | Encycl. 3: 97 | 1789 |
| Ranunculaceae | |
Helleborus vesicarius
| Aucher | Ann. Sci. Nat., Bot., sér. 2, 16: 357 | 1841 |
| Ranunculaceae | |
Helleborus viridis
| L. | Sp. Pl. 1: 558 | 1753 |