Hawaiian hibiscus
Hawaiian hibiscus are seven species of hibiscus native to Hawaii. The yellow hibiscus is Hawaii's state flower. Most commonly grown as ornamental plants in the Hawaiian Islands are the Chinese hibiscus ("Hibiscus rosa-sinensis") and its numerous hybrids, though the native "Hibiscus arnottianus" is occasionally planted. The native plants in the genus "Hibiscus" in Hawaii are thought to have derived from four independent colonization events for the five endemic species (four closely related species plus the yellow-flowered species) and one each for the two indigenous species. Native species. The native hibiscus found in Hawaii are: Other  Malvaceae. In addition to the species of "Hibiscus" listed above, flowers of several other related Hawaiian plants of the family Malvaceae resemble "Hibiscus" flowers, although are generally smaller. The endemic genus, "Hibiscadelphus", comprises seven species described from Hawaii. Three of these are now thought to be extinct and the remaining four are listed as critically endangered or extinct in the wild. Another endemic genus, "Kokia", comprises four species of trees. All but one ("K. kauaiensis") are listed as either extinct or nearly extinct in the wild. Three endemic species of the pantropical genus, "Abutilon" occur in Hawaii: "A. eremitopetalum", "A.  menziesii", and "A. sandwicense"; all are listed as endangered. Cotton plants ("Gossypium" spp.), whose bright yellow flowers are certainly hibiscus-like, include one endemic: "G. tomentosum", uncommon but found in dry places on all the main islands except Hawaii. The widespread "milo" ("Thespesia populnea") is an indigenous tree with yellow and maroon flowers. South Korea's national flower is the Hibiscus syriacus which is widely found in Hawaii, too.