Streptanthus cordatus stem. Flowers occur at intervals along the upper stem. Each has a calyx of sepals roughly a centimeter long which begin greenish yellow and mature purple. Four purple petals emerge from the tip of each calyx. The fruit is a thin, narrow silique which may reach 14 centimeters in length or longer. Streptanthus cordatus Streptanthus cordatus is a species of flowering plant in the mustard family known by the common name heartleaf twistflower. It is native to the western United States, where it can be found in many types of sagebrush, woodland, and forest habitat. It is a perennial herb
Limnophila (plant) serrated edges. Some species have flowers solitary in the leaf axils, and others have flowers in inflorescences. The sepals are arranged in a tubular calyx, and the corolla is tubular or funnel-shaped. The corolla has a lower lip with three lobes and an upper lip that is unlobed or double-lobed. "Cabomba caroliniana", a plant in a different family, is noted for having leaves that resemble those of "Limnophila". There are about 40 species in the genus. Species include: Limnophila (plant) Limnophila is a genus of flowering plants in the plantain family, Plantaginaceae. It is distributed in tropical and subtropical regions