Phenology: Fruiting summer. Habitat: Fresh lakeshores, shallow ponds, streams, floating mats, bogs, fens, ditches Elevation: 20–800 m Generated Map Legacy Map
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37. Plants annual or perennial; usually aquatic, rooted and emergent or floating, sometimes terrestrial; rhizomatous and/or cespitose; synoecious. Culms
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some or all leaves floating, limp. Leaves when erect rather stiff, partially to entirely keeled, flat, to 0.8 m × 4–10 mm; floating leaves limp, keeled
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Volume 24. Treatment on page 46. Plants perennial; aquatic, producing long, floating culms; synoecious. Culms 50-150 cm, spongy, developing adventitious-roots
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the common floating-leaved pondweed of the north temperate ure areas. It is essentially circumboreal and can easily be identified by floating leaves that
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cm; nodal glands absent. Turions absent. Leaves both submersed and floating, or floating absent, spirally arranged. Submersed leaves petiolate, lax; stipules
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Volume 3. Mentioned on page 132. Plants glabrous. Stems leafy, creeping or floating, not bulbous-based, without bulbils. Roots nodal, never tuberous. Leaves
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Submerged in somewhat nutrient-rich lakes, ox-bow lakes, small bodies of water, floating or among reeds or sedges along shores Elevation: low to high elevations
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separate rames in the same inflorescence. Culms to 3 m, erect, creeping, or floating, branched; internodes solid. Leaves not aromatic; ligules membranous. Inflorescences
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ground-level stems, horizontal stems often rooting at nodes, sometimes floating, aerial stems glabrous proximally, finely appressed-hairy and often purplish-glandular
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page 60. Mentioned on page 47. Plants coarse and robust; usually found floating, submerged or stranded; capitulum not apparent, leaves crowded into a tuft;
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22. Herbs, 0.5–30 (–50) cm. Leaves submersed, floating, or emersed; submersed sessile, ribbonlike; floating linear, 15–100 × 0.2–2 (–3) cm, blade present
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5–30 cm; nodal glands absent. Turions absent. Leaves both submersed and floating or only submersed, spirally arranged. Submersed leaves petiolate, lax;
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on arching or horizontal culms, especially when growing as submerged or floating aquatics. Because many such plants reproduce entirely asexually and have
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John Myers Copyright: Flora of North America Association Stems creeping or floating, rooting nodally, glabrous, not bulbous-based. Tuberous roots absent. Basal
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of North America Association Rhizomes 1-2.5 (-4) cm diam. Leaves mostly floating, occasionally submersed; petiole flattened. Leaf-blade often abaxially
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2n = 60. Phenology: Fruiting late spring–summer. Habitat: Fens, bogs, floating mats on lakeshores, emergent sedge marshes, usually in very wet sites,
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Flora of North America Association Rhizomes 3-8 cm diam. Leaves mostly floating, occasionally emersed or submersed; petiole terete. Leaf-blade abaxially
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to 0.7 mm. Phenology: Fruiting spring–fall. Habitat: Lakes and streams, floating, or raft-forming, or along margins Elevation: 0–50 m Generated Map Legacy
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Illustrator: John Myers Copyright: Flora of North America Association Plants floating or rooted. Sterile leaves deltate to cordate to ovate. Petiole of sterile
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