Potamogeton vaseyi J.W.Robbins
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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 - thin and transparent, narrowly linear, 2–6 cm × 0.2–1 mm, sharply acute, 1-nerved or rarely with 2 weak lateral nerves, without lacunar cells; stipular sheaths free, linear, scarcely encircling the stem, 4–10 mm, scarious, weakly fibrous in age; floating lvs rather sparingly produced on at least some plants of a colony, the blade spatulate to obovate, 8–15 mm, 5–9- veined, the spaces between the veins filled by minute, elliptic lacunar cells, the petiole ca as long as the blade; winter-buds 1–3 cm, the inner lvs rolled into a hard, fusiform structure; peduncles slender, 0.5–3 cm; spikes cylindric, 3–8 mm, with 1–4 ± contiguous whorls of fls; fr obovoid, 1.5–2.5 mm, with flat or shallowly pitted sides, with or without a low, rounded dorsal keel; 2n=28. In quiet water; N.B. and s. Que. to Minn., s. to Pa., O., and Ill. (P. lateralis, the name based on a mixture of P. pusillus and P. vaseyi)
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Common Names
Vasey's pondweed