Glossary of plant morphology others may form a tight spiral, or whorl, around the flower stem. First, at the base, are those non-reproductive structures involved in protecting the flower when it is still a bud, the sepals, then are those parts that play a role in attracting pollinators and are typically coloured, the petals, which together with the sepals make up the perianth (perigon, perigonium). If the perianth is differentiated, the outer whorl of sepals forms the calyx, and the inner whorl of petals, the corolla. If the perianth is not differentiated into sepals and petals, they are collectively known as tepals. In some
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