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: Campanulids: Dipsacales
Britton & Brown Illus Flora of Northeast US & adjacent Canada (Gleason, 1952)
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JK Marlow jkm150329_031
March Greenville County SC
Swamp Rabbit Trail
Main cauline leaves narrowly spatulate to elliptic-lanceolate, per Vascular Flora of the Carolinas.
Terry Holdsclaw tdh_v_locusta_8993
March Catawba County NC
Corolla 1-2mm long, lobes pale blue; stamens included or essentially so, per Vascular Flora of the Carolinas.
Terry Holdsclaw tdh_v_locusta_0065
April Catawba County NC
Plant usually 1-3dm tall (vs. V. radiata often 2-7dm tall), per Vascular Flora of the Carolinas.