Characteristic of tropical locales, the hibiscus genus actually offers astounding versatility — gracing gardens from north to south with winter-hardy species in addition to tropical ones. Hibiscus plants are iconically identified by their watermelon red, saucer-shaped blooms, punctuated by bright sparks of pollen. But depending on the species and cultivar, hibiscus flowers can be found in a range of colors. Members of the Mallow (or Malvaceae) family, hibiscus are closely related to hollyhock, cotton and okra. They are favored by hummingbirds, butterflies and other pollinators, making them useful additions to your garden ecosystem.