They're called Night Primroses since the bloom opens within the night and stays open till the following early morning. The entire plant is edible, lemon-scented, and draws in night-flying moths at night and bees in the morning. This can be an erect perennial that generates showy spikes of two-lipped flowers https://flower-shop50616.verybigblog.com/15718076/flowers-for-dummies