| Apiaceae | |
Cicuta africana
| (L.) Lam. | Encycl. 2: 4 | 1786 |
| Apiaceae | |
Cicuta ampla
| Greene | Leafl. Bot. Observ. Crit. 2(11): 241 | 1912 |
| Apiaceae | |
Cicuta angustifolia
| Kit. | Oestr. Fl. ed. 2, 1: 515 | 1814 |
| Apiaceae | |
Cicuta arguta
| Greene | Leafl. Bot. Observ. Crit. 2(11): 238 | 1912 |
| Apiaceae | |
Cicuta baldacciana
| (Degen & Bald.) Degen ex Bald. | Itin. Alban. 180 | 1917 |
| Apiaceae | |
Cicuta bolanderi
| S. Watson | Proc. Amer. Acad. Arts 11: 139 | 1876 |
| Apiaceae | |
Cicuta bulbifera
| L. | Sp. Pl. 1: 255 | 1753 |
| Apiaceae | |
Cicuta californica
| A. Gray | Proc. Amer. Acad. Arts 7(2): 344–345 | 1868 |
| Apiaceae | |
Cicuta cellulosa
| Gilib. | Fl. Lit. Inch. 2: 36 | 1782 |
| Apiaceae | |
Cicuta cinicola
| A. Nelson | Bot. Gaz. 54(2): 141–142, f. 1 | 1912 |
| Apiaceae | |
Cicuta crassifolia
| Nutt. | U.S. Expl. Exped. 17(2): 316 | 1874 |
| Apiaceae | |
Cicuta curtissii
| J.M. Coult. & Rose | Contr. U.S. Natl. Herb. 7(1): 97 | 1900 |
| Apiaceae | |
Cicuta cynapicum
| Crantz | Cl. Umbel. 98 | 1767 |
| Apiaceae | |
Cicuta cynapium
| O. Targ. Tozz. | Inst. Bot. 2: 227 | 1796 |
| Apiaceae | |
Cicuta dahurica
| Fisch. ex Schultz | | |
| Apiaceae | |
Cicuta dakotica
| Greene | Leafl. Bot. Observ. Crit. 2(11): 237–238 | 1912 |
| Apiaceae | ! |
Cicuta douglasii
| (DC.) J.M. Coult. & Rose | Contr. U.S. Natl. Herb. 7(1): 95 | 1900 |
| Apiaceae | |
Cicuta fimbriata
| Greene | Leafl. Bot. Observ. Crit. 2(11): 240 | 1912 |
| Apiaceae | |
Cicuta frondosa
| (Greene) Greene | Leafl. Bot. Observ. Crit. 2(11): 236 | 1912 |
| Apiaceae | |
Cicuta grandifolia
| Greene | Leafl. Bot. Observ. Crit. 2(1): 24 | 1909 |
| Apiaceae | |
Cicuta linearifolium
| S. Watson | Proc. Amer. Acad. Arts 22: 415 | 1887 |
| Apiaceae | |
Cicuta mackenziana
| Raup | J. Arnold Arbor. 17(4): 279–280, pl. 197 | 1936 |
| Apiaceae | |
Cicuta maculata
| L. | Sp. Pl. 1: 256 | 1753 |
| Apiaceae | |
Cicuta major
| Lam. | Fl. Franç. 3: 456 | 1778 [1779] |
| Apiaceae | |
Cicuta major
| Garsault | Fig. Pl. Méd. t. 223 | 1764 |
| Apiaceae | |
Cicuta mexicana
| J.M. Coult. & Rose | Proc. Wash. Acad. Sci. 1(3): 145 | 1900 |
| Apiaceae | |
Cicuta minor
| Garsault | Fig. Pl. Méd. t. 224 | 1764 |
| Apiaceae | |
Cicuta monnieri
| (L.) Crantz | 98 | 1767 |
| Apiaceae | |
Cicuta nipponica
| Franch. | Bull. Soc. Bot. France 26: 85–86 | 1879 |
| Apiaceae | |
Cicuta occidentalis
| Greene | Pittonia 2(7A): 7–8 | 1889 |
| Apiaceae | |
Cicuta officinalis
| Crantz | Class. Umbell. 98 | 1767 |
| Apiaceae | |
Cicuta orientalis
| Degen | Term. Közl. 36: 38 | 1896 |
| Apiaceae | |
Cicuta perennans
| Walter | Fl. Carol. 116 | 1788 |
| Apiaceae | |
Cicuta pumila
| Behm | Bot. Not. 1887: 180 | 1887 |
| Apiaceae | |
Cicuta purpurata
| Greene | Pittonia 2(7A): 8–9 | 1889 |
| Apiaceae | |
Cicuta resinifera
| (Guss.) M. Hiroe | Umbelliferae World 1163 | 1979 |
| Apiaceae | |
Cicuta sinensis
| Zuccagni | | |
| Apiaceae | |
Cicuta sonnei
| Greene | Leafl. Bot. Observ. Crit. 2(11): 239–240 | 1912 |
| Apiaceae | |
Cicuta subfalcata
| Greene | Leafl. Bot. Observ. Crit. 2(11): 237 | 1912 |
| Apiaceae | |
Cicuta tenuifolia
| Schrank | Denkschr. Königl. Akad. Wiss. München 7: 56 | 1818 |
| Apiaceae | |
Cicuta trachypleura
| (A. Gray) S. Watson | Smithsonian Misc. Collect. 258: 417 | 1878 |
| Apiaceae | |
Cicuta vagans
| Greene | Pittonia 2(7): 9–10 | 1889 |
| Apiaceae | |
Cicuta valida
| Greene | Leafl. Bot. Observ. Crit. 2(11): 238–239 | 1912 |
| Apiaceae | |
Cicuta venenosa
| J. Greenway | Trans. Amer. Philos. Soc. 3: 235–239 | 1793 |
| Apiaceae | |
Cicuta victorinii
| Fernald | Rhodora 41(489): 441, pl. 561 | 1939 |
| Apiaceae | |
Cicuta virosa
| L. | Sp. Pl. 1: 255 | 1753 |