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Hibiscus × rosa-sinensis, known colloquially as Chinese hibiscus, China rose, Hawaiian hibiscus, rose mallow and shoeblack plant, is a cultigen of tropical hibiscus, a flowering plant in the Hibisceae tribe of the family Malvaceae. It is an artificial hybrid created in cultivation in pre-European times by Polynesians in the west Pacific from the species Hibiscus cooperi and H. kaute. It is widely cultivated as an ornamental plant in the tropics and subtropics. The hibiscus is the national flower of Malaysia, where it holds official status, and is also considered the unofficial national flower of Haiti.
Hibiscus × rosa-sinensis is a bushy, evergreen shrub or small tree growing 2.5–5 m (8–16 ft) tall and 1.5–3 m (5–10 ft) wide. The plant has a branched taproot. Its stem is aerial, erect, green, cylindrical, and branched.
Its leaves are simple and petiolate, with alternate phyllotaxy. The leaf shape is ovate while the tip is acute, and the margin is serrated. Venation is unicostate reticulate, meaning the leaves' veins are branched or divergent. Their surfaces are glossy. Free lateral stipules are present.
Its flowers bloom in summer and autumn. They are solitary (axillary) and symmetrical. They are typically red, with five petals 10 cm (4 in) in diameter, with prominent orange-tipped red anthers. Cultivars and hybrids have flowers in a variety of colors as well as red: white, pink, orange, peach, yellow, blue, and purple. Some plants have double flowers.
