Cicuta douglasii, the western water hemlock, is a poisonous plant in the family Apiaceae. It is a perennial plant that grows in wet places such as marshes, stream banks, slough margins, ditches, meadows, and wet pastures. The roots are thick and tuberous, with many smaller tubers on the main tuber, allowing survival in wet conditions. Water hemlock is most abundant in British Columbia, and is indigenous to North America, where it grows primarily from the base of the Rocky Mountains to the Pacific ...