Common Water-Nymph

Najas guadalupensis is a species of aquatic plant in the Hydrocharitaceae family. It is commonly referred to as southern waternymph, guppy grass, najas grass, or common water nymph. The plant is native to the Americas, with a widespread distribution across Canada, the United States, Mexico, Central America, the West Indies, and South America. It has also been introduced to regions outside its native range, including Japan, Palestine, and Israel. The species was first published in 1870.