Baker J. Bot. 24: 98. 1886. Clifton E. Nauman Common names: Water spangles floating fern. Illustrated Treatment appears in FNA Volume 2. Treatment on page
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perennial, rhizomatous, caulescent; turions absent. Leaves alternate, floating [submersed], petiolate [sessile]; sheath not persisting longer than blade
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late in growing season. Leaves arising directly from rhizome, alternate, floating or emersed; petiole long. Leaf-blade peltate, orbiculate, margins entire;
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Treatment appears in FNA Volume 22. Treatment on page 151. Roots absent. Fronds floating or submersed (only turions sink to bottom), 1 or 2, coherent, each frond
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Pl. 2: 190. 1818. Charles J. Sheviak Common names: Water-spider orchid Floating orchid water orchid Illustrated Synonyms: Habenaria nuttallii Small Treatment
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submersed and floating; petiole short to long. Submersed leaves: blade in 3-7 dichotomously [trichotomously] branched, linear segments. Floating leaves: blade
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Illustrator: John Myers Copyright: Flora of North America Association Stems leafy, floating or creeping, rooting at nodes. Basal leaves: blade ovate-reniform or cordate
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10–35 cm; glands absent. Turions absent. Leaves both submersed and floating or floating absent, spirally arranged. Submersed leaves sessile, lax; stipules
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appears in FNA Volume 10. Herbs, annual, aquatic, rosette-forming, rooted or floating, to 50 dm (when rooted in deep water), glabrous or velutinous. Stems submerged
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3, 8: 186. 1821. Robert M. Lloyd Common names: Antler ferns water ferns floating ferns Etymology: Greek cerato, horned, and pteris, fern, referring to the
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rounded; sheath not winged. Stipes white, thin, often decaying. Fronds floating, 1 or 2–5 or more, coherent in groups, obovate, often gibbous, 1–8 mm,
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minima Séguier Pl. Veron. 3: 52. 1754. Clifton E. Nauman Common names: Floating fern water spangles Etymology: for Antonia Maria Salvini,1653--1729, an
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glabrous (or sheathing leaf-bases sometimes pubescent). Stems creeping or floating, not bulbous-based, without bulbils. Roots nodal, never tuberous. Leaves
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distinct, released from spathe and floating to surface; anthers spheric; pollen in monads. Pistillate flowers floating; ovary 1-locular; styles 1, not 2-fid
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the aquatic habitat Treatment appears in FNA Volume 22. Herbs, aquatic, floating on still or slow-moving water. Stolons frequently produced, terminating
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Treatment on page 54. Plants perennial; aquatic, usually rooted, sometimes floating; stoloniferous, sometimes mat-forming; monoecious. Culms 10-100+ cm, erect
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page 47, 64, 65, 67, 68, 70, 73, 76, 82. Plants varying from lax, free-floating forms to compact terrestrial forms, usually with distinct capitulum; green
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linear or sometimes oblanceolate, apex acuminate to obtuse. Petiolate leaves floating or emersed; blade reniform, cordate, or oblong, membranous, apex acute
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Rhizomes absent; stolons floating on or suspended in water, rooted or not, unbranched, short. Leaves basal, emergent or floating, petiolate; blade elliptic
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Machaerocarpus Small Treatment appears in FNA Volume 22. Plants perennial, floating-leaved or emersed, glabrous; rhizomes usually absent; stolons absent; corms
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