Bulblet-bearing Water-hemlock, Bulblet-bearing Water-hemlock, Bulbous Water-hemlock: Cicuta bulbifera -
Douglas Water Hemlock, Douglas' Water-hemlock, Western Water Hemlock, Western Water-hemlock: Cicuta douglasii (Synonym: Cicuta maculata var. californica) -
Spotted Water Hemlock, Spotted Water-hemlock, Spotted Cowbane: Cicuta maculata var. angustifolia (Synonym: Cicuta occidentalis) -