The endemic Ma‘o Hau Hele, Hawai‘i's official State flower, is believed to be extinct in the wild, however it grows quite well in botanical gardens. 

The O‘ahu Koki‘o Ke‘oke‘o one of the few hibiscus species in the world with a fragrance.  Its relatives, the Kaua‘i white hibiscus and the Moloka‘i white hibiscus, look similar but with slight variations.  The Moloka‘i species is very rare and only found in one location on the island.  Because of their fragrance, the O‘ahu and Kaua‘i hibiscus has been used most often in hybridization throughout the world, and has even been exported to other places for use as decorative landscaping. 

The rare St. John's hibiscus is found naturally only in the forests of northwestern Kaua‘i.

The Koki‘o ‘Ula, our native red hibiscus, comes not only in red, but in shades of similar color, ranging from pink through orange.  This was Hawai‘i's official flower from 1923 to 1988.  It was replaced because of confusion between it and the ornamental Chinese Hibiscus, also red but with much larger and abundant flowers.