Potamogeton vaginatus Turcz.
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Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Family
Potamogetonaceae
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Scientific Name
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Description
Species Description - Much like no. 1 [Potamogeton filiformis Pers.], avg coarser; tubers 3–5 cm; lvs 1–2 mm wide; stipular sheaths (at least of the primary lvs) subinflated, 2–3 times as thick as the stem, 2–5 cm, open to the base; spike with 5–12 nearly equidistant whorls of fls, 3–8 cm at maturity; fr 3–3.5 mm; 2n=78. Deep, alkaline or brackish waters; circumboreal, in Amer. s. to N.J., Mich., N.D., and Utah.
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Common Names
bigsheath-pondweed