Kokiʻo keʻokeʻo, Oʻahu white hibiscus, Punaluʻu white hibiscus Malvaceae Endemic to the Hawaiian Islands Oʻahu (Cultivated)  My hand is used for scale, but the leaves get even larger than this! Most probably the largest leaves and flowers of all the native Hawaiian hibiscuses.  NPH00028 nativeplants.hawaii.edu/plant/view/Hibiscus_arnottianus_p...