Lizards Tail (Saururus cernuus)

Where to plant: muddy zone or very shallow water
Type: herbaceous perennial
Height x spread (ft): 1-2 x 1-2
Blooms: summer
Bloom: showy, fragrant, white
Sun: full sun to partial shade
Water: wet
Maintenance: low
Tolerates: heavy shade, wet soil

https://plants.ces.ncsu.edu/plants/all/saururus-cernuus/