Dig deeper at SERNEC, a consortium of southeastern herbaria.
Read about Night-blooming Wild Petunia from Linda Chafin and the Southern Appalachian Botanical Society.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Lamiids: Lamiales
Night-flowering Wild Petunia, Night-blooming Wild Petunia
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Richard and Teresa Ware rtw_ruellia_noctiflora_19
Corolla 6-10cm long, opening at night and withering by mid-morning, per Weakley's Flora (2012).
Richard and Teresa Ware rtw_ruellia_noctiflora_40
Flowers more than 3" across, glistening white, with 5 spreading petals, per Field Guide to the Rare Plants of Georgia.