Nyctaginaceae
Fls perfect or unisexual, us. cymose, often involucrate. Calyx tubular, often petaloid; petals 0; stamens 1 - ∞. Ovary superior, 1-celled; ovule solitary, erect. Fr. a nut-like achene, sts enclosed in persistent calyx-tube, often glandular; embryo large. Herbs, shrubs or trees with simple, exstipulate, us. opp. lvs. About 20 genera, mainly of America.
