bitter water-nymph, more...
[Caulinia minor (All.) Coss. & Germ.]
Etymology: Najas: from Greek Naias, a water nymph
Plants: submerged annual, aquatic; stems with many branches near the top, without prickles
Leaves: stiffening and curving with time; edges with 7-15 teeth per side
Flowers: 1-2 per axil; both staminate and pistillate on the same plant
Invasiveness: Prohibited Invasive - Eradicate!
Conservation Status: Introduced - adventive; potentially invasive