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Butomaceae
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FNA
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Robert R. Haynes in Flora of North America (vol. 22)
Herbs, perennial, rhizomatous, stemless, glabrous; sap clear. Roots not septate. Leaves basal, emersed or rarely submersed, sessile, sheathing somewhat proximally; blade with lade: translucent markings absent, basal lobes absent; venation parallel. Inflorescences scapose umbels, erect, bracteate. Flowers bisexual, hypogynous, pedicellate; tepals persistent, 6, in 2 series, scarious; stamens 9, distinct; anthers 4-loculed, dehiscing longitudinally; pistils 6, coherent proximally, 1-loculed; placentation laminar; ovules 50. Fruits follicles. Seeds: embryo straight; endosperm absent in mature seed.
Butomus umbellatus
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