Flora of Niue

Bulbophyllum distichobulbum is a species of orchid in the genus Bulbophyllum.

Terminalia richii, with the common name malili, is an upright forest tree species native to the central South Pacific in Oceania. The wood grown on this tree can be used mainly for construction and timber, and for other numerous purposes.

Asplenium schizotrichum is a species of spleenwort that is native to the island of Rarotonga in the Cook Islands and Niue. Its population on Rarotonga is estimated to be fewer than 20 mature individuals. The species was described in 1931 by Edwin Copeland.

Bulbophyllum hassallii is a species of orchid in the genus Bulbophyllum.

Syzygium inophylloides is a species of flowering plant in the myrtle family, Myrtaceae. It is a tree native to Niue, the Samoan Islands, Tonga, and Wallis and Futuna.

Syzygium dealbatum is a species of flowering plant in the myrtle family, Myrtaceae. It is a tree native to Niue, the Samoan Islands, Tonga, and Wallis and Futuna. It is a small tree native to lowland forest. In Tonga it grows in forests over thinner, drier soils on coastal dunes and relatively recent lava and ash deposits, where the tree Casuarina equisetifolia is predominant, along with Pandanus tectorius, Hibiscus tiliaceus, and Scaevola taccada.

Syzygium corynocarpum is a species of flowering plant in the myrtle family, Myrtaceae. It is a tree native to Fiji, Niue, Tonga, and Wallis and Futuna. It has been introduced to the Samoan Islands. It is a small tree native to lowland forest. It is common in Fiji.

Psychotria insularum is a rainforest understory shrub from the coffee family, Rubiaceae. Its native range is the South Pacific. It has traditional uses in herbal medicine. In 2021, the potent anti-inflammatory rutin was isolated from P. insularum (known in Samoa as "matalafi").

Syzygium clusiifolium is a species of flowering plant in the myrtle family, Myrtaceae. It is a tree native to Niue, the Samoan Islands, Tonga, Vanuatu, and Wallis and Futuna. In Vanuatu it is found on Malakula, Paama, Pentecost, Espiritu Santo, Efate, Aneityum, Aniwa, Tanna, and Hiu. It is a small to medium-sized tree growing up to 20 meters tall. It has red fruits. It grows mostly in littoral coastal forest and lowland rainforests, in primary forest, secondary forest, and disturbed areas, up to 300 meters elevation. In the Samoan Islands it also grows on offshore tuff cone volcanic islets.

Cryptocarya turbinata is a species of flowering plant in the laurel family, Lauraceae. It is a tree native to Fiji, Niue, the Samoan Islands, Tonga, and Vanuatu. In Tonga it is a common canopy tree in lowland tropical rain forest below 500 meters elevation.

Phaleria disperma is an ornamental flowering evergreen plant native to the southwestern Pacific, where it is found in Fiji, Niue, Samoa, Tonga, and Wallis and Futuna.

Calophyllum vitiense is a species of flowering plant in the family Calophyllaceae. It is a tree native to Fiji, Niue, the Santa Cruz Islands, Solomon Islands, and Tonga.

Gardenia taitensis, also called Tahitian gardenia or tiaré flower, is a species of plant in the family Rubiaceae. It is an evergreen tropical shrub that grows to 4 m (10 ft) tall and has glossy dark green leaves that are 5–16 cm (2–6 in) long and are oppositely arranged along the stem. The flower is creamy white and pinwheel-shaped with 5–9 lobes, each 2–4 cm (0.8–2 in) long and fragrant. Native to the highland shores of the South Pacific, it has the distinction of being one of the few cultivated plants native to Polynesia. It is the national flower of French Polynesia and the Cook Islands.

Wikstroemia coriacea is a species of plant in the Thymelaeaceae family. It is native to French Polynesia (Marquesas, Society, and Tubuai islands) and the Cook Islands, Tonga, and Niue.

Cyperus seemannianus is a species of sedge native to Fiji, Niue, the Samoan Islands, Society Islands, Tonga, Vanuatu, and Wallis and Futuna in the South Pacific. The species was first formally described by the botanist Johann Otto Boeckeler in 1870.

Ficus scabra is a fig species in the family Moraceae native to Fiji, New Caledonia, Niue, Samoa, Tonga, Vanuatu, and Wallis-Futuna Island in the southwestern Pacific.

Alphitonia zizyphoides is a species of flowering plant in the buckthorn family, Rhamnaceae. It is a tree native to the Cook Islands, Fiji, Niue, the Samoan Islands, the Society Islands, Tonga, Vanuatu, and Wallis and Futuna.

Didymocheton alliaceus is a species of flowering plant in the mahogany family, Meliaceae. It is a tree native to the tropical Pacific islands, ranging from the Solomon Islands to the Caroline Islands, Vanuatu, Fiji, Wallis and Futuna, Niue, Tonga, and the Samoan Islands. It is most closely related to Didymocheton mollissimus of Malesia and mainland Southeast Asia, D. mollis of the Bismarck Archipelago, New Guinea, and Sulawesi, and D. muelleri of northeastern Australia. The species was first described as Trichilia alliacea by Georg Forster in 1786. It was reclassified as Didymocheton

Ischaemum byrone, commonly known as Hilo murainagrass or Hilo ischaemum, is a species of grass native to the Pacific Islands, including the Cook Islands, Fiji, Hawaiian Islands, New Caledonia, Niue, Society Islands, Tonga, Tubuai Islands, and Wallis and Futuna. In Hawaii it is found on the islands of Kauai, Maui, Molokai, and Hawaii but has unfortunately been extirpated from Oahu, where it was once known to grow. There are perhaps 1,000 to 3,000 individual plants remaining in total. This grass is perennial, spreading via stolons, with stems reaching up to 80 centimetres (31 in) in maximum

Kadua romanzoffiensis is a species of flowering plant in the family Rubiaceae, native to parts of the southwestern Pacific (Niue, Samoa, Tokelau and Manihiki, Tuvalu) and much of the south-central Pacific (the Cook Islands, the Line Islands, the Pitcairn Islands, the Society Islands, the Tuamotus, and the Tubuai Islands).

Planchonella torricellensis is a tree in the family Sapotaceae. It is native to Maluku, the Lesser Sunda Islands, New Guinea, Fiji, Niue, the Samoan Islands, Tonga, the Tuamotus, and Wallis and Futuna. It is a large tree, growing up to 40 meters tall. It is a canopy tree in lowland moist forest.

Bulbophyllum longiscapum is a species of orchid in the genus Bulbophyllum.

Bikkia tetrandra (Chamorro: gausåli) is an herbaceous member of the family Rubiaceae, distinguished by its white square-shaped flowers. It is native to Papuasia and islands of the western Pacific, including the Caroline Islands, Fiji, Mariana Islands, New Caledonia, New Guinea, Niue, Solomon Islands, Tonga, Vanuatu, and Wallis-Futuna Islands. The stems ignite easily and can be used to make torches or candles. Bikkia tetrandra has become a popular symbol of native ecology on the island of Guam. There were two failed legislative proposals on Guam in 2014 and 2018 to make Bikkia tetrandra the

Calophyllum neoebudicum is a species of tree in the Calophyllaceae family. It is found in American Samoa, Fiji, Indonesia (Sulawesi), Niue, Papua New Guinea (the Bismarck Archipelago), Samoa, the Santa Cruz Islands, the Solomon Islands, Tonga, Vanuatu, and Wallis and Futuna. The species was described by André Guillaumin in 1931.

Solanum repandum is a species of evergreen shrub native to various island groups across the Pacific Ocean (Bismarck Archipelago, Cook Islands, Fiji, Mariana islands, Marquesas, Niue, Pitcairn Islands, Samoa, Society Islands, Vanuatu), and occasionally grown for its edible fruit. Only partially domesticated and very rare in cultivation outside of its native range, it is also known as kokoua or huou. Solanum repandum will apparently hybridize with a number of close relatives, including the South American naranjilla, pseudolulo, and Solanum candidum, along with the Solanum lasiocarpum, from

Planchonella tahitensis is a tree in the family Sapotaceae. It is native to the islands of the south Pacific, including the Cook Islands, Fiji, Niue, the Samoan Islands, Society Islands, Tonga, Tuamotu, Tubuai Islands, Vanuatu, and Wallis and Futuna.

Premna tahitensis is a species of plant in the family Lamiaceae. It is native to the Bismarck Archipelago in Papuasia and some islands of the south Pacific: Fiji, the Marquesas Islands, Niue, the Pitcairn Islands, Samoa, the Society Islands, Tonga, the Tuamotu Islands, the Tubuai Islands, and Wallis and Futuna.

Trachoma papuanum, commonly known as the yellow spectral orchid, is an epiphytic or lithophytic clump-forming orchid with a between three and six thick, fleshy leaves and many dull yellow flowers with a white labellum opening in groups of up to four. This orchid occurs in New Guinea, Queensland and some islands in the South Pacific.

Solanum viride, the green nightshade, garland berry, cannibal's tomato, poroporo or boro dina, is a species of flowering plant in the family Solanaceae. It is native to the Cook Islands, Fiji, Marquesas Islands, Niue, Pitcairn Islands, Samoan Islands, Society Islands, Tokelau and Manihiki, Tonga, Tuamotus, and Tubuai Islands in the South Pacific. It has been introduced to Hawaii. In Fiji at the time of contact, human meat was cooked wrapped in its leaves, and a condiment for the meal was made from the fruit.

Passiflora aurantia, the orange-petaled passion flower, is a species in the family Passifloraceae which produces edible but not particularly palatable fruit. It is native to New Caledonia and Australia.