Hibiscus, a large genus of herbs, shrubs, and small trees of the mallow family. There are more than 150 species, about 20 of which grow in the United States. The hibiscus ranges in height from 12 inches (30 cm) for herbs to 20 to 30 feet (6 to 9 m) for tropical trees. The leaves are lobed or tooth-edged. The flowers have five petals and are white, yellow, pink, scarlet, or red.

Widely grown in the United States is the rose of Sharon, or althea, a late-blooming Chinese shrub. The rose of China, which may grow 30 feet (9 m) high in the tropics, is often raised in the South and in greenhouses. Other species include the musk mallow, the seeds of which are used for perfume; and the rose mallow, native to the salt marshes of the Atlantic coast.

The rose of Sharon is Hibiscus syriacus; rose of China, H. rosasinensis; musk mallow, H. abel-moschus; rose mallow, H. moscheutos. The hibiscus belongs to the family Malvaceae.

HibiscusHibiscus has lobed or tooth-edged leaves and five-petaled flowers.