Hibiscus rosa-sinensis, known colloquially as the Chinese hibiscus, China rose and shoe flower, is an evergreen flowering shrub native to East Asia. It is widely grown as an ornamental plant throughout the tropics and subtropics. The flowers are large, generally red in the original varieties, and firm, but generally lack any scent. Numerous varieties, cultivars, and hybrids are available, with flower colors ranging from white through yellow and orange to scarlet and shades of pink, with both single and double sets of petals. Despite their size and red hues attractive to nectar-feeding birds, they are not visited regularly by hummingbirds when grown in the Neotropics. Generalists, like the Sapphire-spangled Emerald, Amazilia lactea, or long-billed species, like the Stripe-breasted Starthroat, Heliomaster squamosus, are occasionally seen to visit it, however. In the subtropical and temperate Americas, hummingbirds are attracted to them on a regular basis. Often the progeny of these crosses are sterile, but some are fertile, further increasing the complexity of variability and the possibility of a virtually unlimited number of eventual Hibiscus rosa-sinensis varieties. This further attracts the hobbyists, who have created local and international associations, societies, publications, and manuals to further this hobby, which is practiced with these tropical plants worldwide, including indoors in cold climates.