Najas flexilis var. guadalupensis (Spreng.) A.Braun
Najas microdon A.Braun
Najas microdon var. curassavica (A.Braun) A.Braun
Najas microdon var. guadalupensis (Spreng.) Morong
Najas punctata (A.Braun) Rendle
Najas urbaniana O.Schmidt
Najas guadalupensis is a species of aquatic plant known by the common names southern waternymph,[3]guppy grass, najas grass, and common water nymph. It is native to the Americas, where it is widespread. It is considered native to Canada (from AlbertatoQuebec), and most of the contiguous United States, Mexico, Central America, the West Indies and South America. It has been introduced in Japan, and Palestine and Israel.[4]
Najas guadalupensis is an annual, growing submerged in aquatic habitat types such as ponds, ditches, and streams. It produces a slender, branching stem up to 60 to 90 centimeters in maximum length. The thin, somewhat transparent, flexible leaves are up to 3 centimeters long and just 1 or 2 millimeters wide. They are edged with minute, unicellular teeth. Tiny flowers occur in the leaf axils; staminate flowers grow toward the end of the plant and pistillate closer to the base.[5][6][7] They are also a popular aquarium plant for beginners due to their hardiness as well as growth rate, which helps provide shelter for aquarium fish.[8][9]
^USDA, NRCS (n.d.). "Najas guadalupensis". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 16 July 2015.
^Maerz, John C.; Wilde, Susan B.; Terrell, Vanessa K.; Haram, Brigette; Trimmer, R. Clay; Nunez, Chelsea; Cork, Erin; Pessier, Allan; Lannoo, Sue; Lannoo, Michael J.; Diamond, Sara L. (2018-11-01). "Seasonal and plant specific vulnerability of amphibian tadpoles to the invasion of a novel cyanobacteria". Biological Invasions. 21 (3): 821–831. doi:10.1007/s10530-018-1861-6. ISSN1387-3547. S2CID53198641.
