The seeds of this plant are very high in essential fatty acids. Gather the many seeds and grind as you would flax seed. Blooming at dusk each evening these plants are pollinated by giant sphinx moths. We will often pull up lawn chairs in the evening to watch as these flowers unfold. Butter yellow, the blossoms reveal themselves in about 30 minutes and stay open all night only to wilt in the heat of the day. Perennial.