Coarse annual. Leaves ovate to ovate-narrowly elliptic, 2.5-5 by 0.5-1.5 cm. Inflorescence few-flowered; Flowers large, bisexual, scented in the evening. Petals pink above, yellowish below, inrolled in daytime, opening in the evening, lamina 8-12 mm. Capsule ovoid-conical, 15-18 by 8-10 mm, shorter than calyx without teeth. Seeds dark brown to reddish brown, flattened orbicular, rugose, 0.8-1.1 mm.
Asia-Tropical, Europe and Central Asia
Indigenous to Europe and Central Asia. Widely distributed on the northern hemisphere. In Malesia introduced as an ornamental.