| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Apiaceae | Cicuta bulbifera | Bulb-bearing Water-hemlock | Marshes, bogs, swamps, lake and stream margins. | NL (Newfoundland) west to AK, south to MD, n. VA (?), OH, KY, IN, IL, IA, NE, MT, ID, and OR; disjunct (perhaps introduced only) in NC and FL. |  |
| Apiaceae | Cicuta maculata var. angustifolia | Wetlands. | QC and AK south to AR, LA, TX, NM, AZ, CA, and Mexico. | ||
| Apiaceae | Cicuta maculata var. bolanderi | ||||
| Apiaceae | Cicuta maculata var. maculata | Water-hemlock | Marshes, bogs, seepages, fens, ditches, swamp forests. | NS west to AK, south to FL, CA; Mexico. |  |