2, lotus, also known as lotus, water hibiscus, belongs to the water lily family perennial aquatic herbaceous flowers, underground stems are long and plump, with long nodes, leaf shields rounded, the flowering period from June to September, single at the top of the pedicel, the petals of most of the flower, the nut ellipsoid, the seeds are ovate, there are many kinds of lotus, divided into two categories of ornamental and edible, the lotus flower is the whole body all the treasures, the root and the lotus seed can be eaten. Lotus seeds, rhizomes, root nodules, lotus leaves, flowers and seed germs can be used as medicine.