Najas gracillima (A.Braun ex Engelm.) Magnus
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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
Hydrocharitaceae
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Scientific Name
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Description
Species Description - Monoecious; light green; stems 0.5–5 dm, only 0.2–0.7 mm thick, sparingly branched; lvs lax, 0.5–3 cm × 0.1–0.5 mm, spreading to ascending, minutely serrulate with 13–17 unicellular teeth per side, the base abruptly expanded and minutely fringe- toothed across the subtruncate summit (but not down its sides); anthers monothecal and with a single microsporangium; style offset from the apex of the fr; seeds 2.0–3.2 mm, light brown, fusiform-cylindric, pitted with 20–45 longitudinal rows of minute areolae a little higher than wide. Oligotrophic, soft-water lakes; N.S. to Ala., w. to Minn. and Io., intolerant of pollution and now become rare.
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Common Names
slender water-nymph