Dig deeper at SERNEC, a consortium of southeastern herbaria.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
SYNONYMOUS WITH (ORTHOGRAPHIC VARIANT)
Britton & Brown Illus Flora of Northeast US & adjacent Canada (Gleason, 1952)
Little Floating Heart
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Patrick D. McMillan pdmncordata_agt1
Leaves mottled green & purple above [vs. N. aquatica's entirely green above], per Vascular Flora of the Carolinas.
Patrick D. McMillan pdmncordata_agt4
Similar to Nymphaea, but leaves much smaller and basal lobes more rounded, per Weakley's Flora.
COMPARE aquatic plants
JK Marlow jkm161001_092
September Chesterfield County SC
Carolina Sandhills National Wildlife Refuge
Flower clusters grow from the stem shortly below the leaf, per Wildflowers of the Sandhills Region.