Observations on a population of over 1000 plants of Cicuta maculata in the mountains of southwest Virginia show the population to be essentially clonal by means of an extensive system of shallow, slender, elongate rhizomes. Although the fleshy poisonous “tubers” that form on the roots of the larger of these plants may occasionally function to a limited degree in gemmiparous asexual reproduction, they appear to be storage structures associated primarily with the ultimate production of a flowering stalk in the sexual reproductive cycle of these short-lived monocarpic perennials.