Potamogeton obtusifolius Mert. & W.D.J.Koch
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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 - Stems very slender, to 1 m, much branched, commonly with paired glands at the nodes; rhizome scarcely developed; lvs all submersed, often suffused with red, linear, 3–10 cm × 1–3.5 mm, obtuse or rounded (sometimes minutely cuspidate) at the tip, the lateral veins 2(4), very delicate, the midvein flanked by 1–4 rows of lacunar cells on each side; stipular sheaths axillary, free, 1–2 cm, very thin and scarious, the margins merely overlapping; winter-buds commonly produced, 3.5–8 cm, but the lvs not strongly differentiated; peduncles axillary, 1–2(–4) cm; spikes 8–15 mm, thick-cylindric, with mostly 3 closely set whorls of fls; body of the fr obovoid, slightly compressed, with or without a low dorsal ridge-keel, 2.5–3.5 mm, the beak 0.6–0.7 mm; 2n=26. In ponds and streams; Que. and N.S. to Mackenzie R. and B.C., s. to n. N.J., Minn., and Wyo.
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Common Names
bluntleaf-pondweed