narrow-leaved pondweed, more...
[Potamogeton rutilus auct. non Wolfg.]
Etymology: Potamogeton: from Greek potamos, "a river," and geiton, "a neighbor," because of the habitat
Plants: perennial, submersed aquatic; from rhizomes
Leaves: alternate, entire, with prominent midvein; narrow, stiff, 3-5 veins, pointed tip; stipules fibrous and white
Flowers: green-brown, small, stalk slender, winter buds flattened, outer leaves arching outward; inflorescence spike with whorls
Fruits: rounded, dry seed