Dig deeper at SERNEC, a consortium of southeastern herbaria.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Lamiids: Lamiales
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Gill Newberry gn07_p_pycnanthemoides_pl
Longest calyx lobes more than half as long as the calyx tube, per Wildflowers of the Eastern United States.