Sagittaria teres
PlantsFamily: Alismataceae · Genus: Sagittaria

Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. 3 vols. Charles Scribner's Sons, New York. Vol. 1: 102. · public_domain
About
Sagittaria teres, the quill-leaved arrowhead or slender arrowhead, is an aquatic plant species in the genus Sagittaria. It is a perennial herb up to 80 centimetres tall. The leaves can grow both under and above the water. The flowers are white, up to 1.5 cm in diameter, borne in one or more whorls on a stalk rising above the leaves.
Summary from Wikipedia
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Growing details and traits for Sagittaria teres in the Library.
No cultivars in the Library yet — the full profile above covers the species itself.