Formerly in its own genus as Gaura biennis. This is an unusual flower here, but locally abundant, as it was here along the Montour Trail in Moon Township, where it grew in several large stands on the bank of a ditch along the trail. Botanical references often tell us it prefers dry soil, but the two stands Father Pitt has photographed were both in decidedly damp places. The curious flowers make as much of a show with their stamens as with their four petals.