Genus Gardenia
Gardenia is a genus of 142 species of flowering plants in the coffee family, Rubiaceae, native to the tropical and subtropical regions of Africa, southern Asia, Australasia and Oceania.Species in the genus Gardenia of plants
Hawaiian gardenia - G. brighamii is a small tree, reaching a height of 5 m . are ovate, 2.2–10.5 cm long and 1.5–5.5 cm wide. The petals of the solitary, white flowers are fused at the base to form a tube 15–20 mm in length and have six lobes.
Gardenia gummifera - Gardenia gummifera is a species of plant in the Rubiaceae family. It is endemic to India.
Oahu gardenia - There are 18 populations remaining with a total of no more than 110 individuals.