"water milfoil." YourDictionary, n.d. Web. 14 January 2019. <https://www.yourdictionary.com/water-milfoil>.
water milfoil. (n.d.). Retrieved January 14th, 2019, from https://www.yourdictionary.com/water-milfoil
Any of various cosmopolitan aquatic herbs of the genus Myriophyllum, having whorls of feathery submersed leaves, especially M. spicatum of Eurasia, which can form dense mats in North American rivers and lakes.