Family, Pink. Color, white, sometimes with a pink tinge. Calyx, tubular, rough, hairy, with 5 teeth. Petals on claws, with crowns at base, 2-cleft. Leaves, ovate to lance-shaped, sessile above, with margined petioles below. Biennial, branching from a stem 1 to 2 feet high. Flowers slightly fragrant, opening in the evening, closing with daylight. Pod opening by ten teeth. Summer.