List of endemic plants of Tonga

Tonga is an archipelago and island nation in the South Pacific. It is home to 30 endemic species and subspecies of vascular plants.^[1][2]

Plants are listed alphabetically by plant family. Extinct and presumed extinct species are indicated with †.

• Meiogyne amicorum (A.C.Sm.) B.Xue & R.M.K.Saunders

• Pritchardia pacifica Seem. & H.Wendl. – Vava'u

• Thelypteris macroptera (Copel.) C.F.Reed – 'Eua

• Dennstaedtia parksii Copel. ex Morton – Tongatapu and 'Eua

• Scaevola porrecta A.C.Sm.

• Phyllostegia tongaensis H.St.John – 'Ata I.

• Grewia amicorum Steud.
• Grewia populoides Burret

• Aglaia heterotricha A.C.Sm. – 'Eua
• Didymocheton tongensis (A.C.Sm.) Holzmeyer & Hauenschild – 'Eua

• Hedycarya alternifolia Hemsl. – 'Eua

• Robiquetia tongaensis P.J.Cribb & Ormerod – Tongatapu and 'Eua

• Pandanus amicalis H.St.John
• Pandanus tongatapuensis H.St.John
• Pandanus vavauensis H.St.John

• Phyllanthus amicorum G.L.Webster

• Pittosporum yunckeri A.C.Sm.

• Plantago euana Hürl. – 'Eua

• Podocarpus pallidus N.E.Gray – 'Eua, Vava'u

• Alphitonia franguloides var. obtusa A.Gray

• Atractocarpus crosbyi (Burkill) Puttock – Vava'u
• Ixora yunckeri A.C.Sm. – 'Eua
• Oldenlandia debilis G.Forst.
• Psychotria euaensis M.Hotta
• Psychotria kaoensis A.C.Sm. – Kao

• Casearia buelowii Whistler – Vava'u
• Xylosma smithiana Fosberg – Tongatabu

• Arytera bifoliata Whistler
• Guioa lentiscifolia Cav.

• Selaginella yunckeri Alston – Kao