Dig deeper at SERNEC, a consortium of southeastern herbaria.
Check out EDDMapS.org to see where this has been reported.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Lamiids: Lamiales
Manual of the Southeastern Flora (Small, 1933)
Swollen Bladderwort, Inflated Bladderwort, Floating Bladderwort
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Patrick D. McMillan pdmuinflata_echaw1
May Berkeley County SC
Francis Marion National Forest
Peduncle with whorl of inflated, leaf-like, fusiform organs (floats), per Weakley's Flora.