Dig deeper at SERNEC, a consortium of southeastern herbaria.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Lamiids: Lamiales
Aquatic & Wetland Plants of Southeastern US (Godfrey & Wooten, 1979 & 1981)
SYNONYMOUS WITH (ORTHOGRAPHIC VARIANT) Dasystoma macrophylla
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Richard and Teresa Ware rtw_d_macrophylluma
The five corolla lobes are widely spreading, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians.
Richard and Teresa Ware rtw_d_macrophylluma_2
Flowers densely hairy within, about 0.6" long, and last for one day, per Wildflowers of Tennessee.