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
Floristic synthesis of North America. BONAP (Kartesz, 2010)
Mentha ×piperita var. piperita
Manual of the Southeastern Flora (Small, 1933)
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Terry Holdsclaw tdh_m_x_piperita_piperita
July Currituck County NC
Flowers in thick compact spikes. Lvs smooth, lanceolate, w 1/8-1/4" petioles, per Wildflowers of the Southern Mountains.