Flora of Bismarck Archipelago

Acalypha hispida, the chenille plant, is a flowering shrub which belongs to the family Euphorbiaceae, the subfamily Acalyphinae, and the genus Acalypha. Acalypha is the fourth largest genus of the family Euphorbiaceae, and contains many plants native to Oceania.

Bulbophyllum nocturnum is a species of epiphytic orchid that grows in New Britain. It was described in 2011, and is the first species of orchid known to consistently flower during the night, and close its flowers during the day.

Epipremnum dahlii is a flowering plant belonging to the genus Epipremnum and family Araceae. it is native to the Bismarck archipelago.

Bulbophyllum bandischii is a species of flowering plant in the family Orchidaceae.

Terminalia archipelagi is a species of plant in the Combretaceae family. It is endemic to the islands of the Bismarck Archipelago, within Papua New Guinea. It is threatened by habitat loss.

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

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

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

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

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

Bulbophyllum hans-meyeri is a species of orchid in the genus Bulbophyllum.

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

Calophyllum waliense is a species of flowering plant in the Calophyllaceae family. It is a tree endemic to Manus Island in the Admiralty Islands in Papua New Guinea. It grows in lowland rain forest up to 500 metres elevation. It is threatened by habitat loss. The species was described by Peter F. Stevens in 1980.

Myristica psilocarpa is a species of plant in the Myristicaceae. It is endemic to Manus Island, Papua New Guinea. The conservation status of this plant is listed as vulnerable on the IUCN Red List. The plant grows in lowland rainforest.

Helicia polyosmoides is a species of flowering plant in the family Proteaceae. It is a tree, up to 25 metres tall, which is endemic to Manus Island in the Admiralty Islands of Papua New Guinea. It grows in lowland rain forest along ridge lines from 100 and 550 metres elevation. It is threatened by habitat loss. The species was described by Don Foreman in 1985.

Helicia peekelii is a species of plant in the family Proteaceae. It is endemic to Papua New Guinea.

Helicia neglecta is a species of flowering plant in the family Proteaceae. It is endemic to Papua New Guinea. It is threatened by habitat loss.

Ficus sciaphila is a species of flowering plant, a tree in the family Moraceae. It is closely related to Ficus copiosa. The species is regarded as endangered by the IUCN. This species is found in the Bismarck Archipelago. Trees can grow up to 8 m tall.

Pleuranthodium peekelii is a monocotyledonous plant species first described by Theodoric Valeton, and given its current name by Rosemary Margaret Smith. Pleuranthodium peekelii is part of the genus Pleuranthodium and the family Zingiberaceae. No subspecies are listed in the Catalog of Life.

Osmoxylon lanceolatum is a species of plant in the family Araliaceae. It is endemic to Papua New Guinea.

Guioa novobritannica is a species of plant in the family Sapindaceae. It is a tree endemic to the island of New Britain in Papua New Guinea. It is known only from Mt. Tangis in Western New Britain, where is grows in submontane rain forest dominated by species of Casuarinaceae at around 740 meters elevation.

Etlingera peekelii is a monocotyledonous plant species first described by Theodoric Valeton, and given its current name by Rosemary Margaret Smith. Etlingera peekelii is part of the genus Etlingera and the family Zingiberaceae. No subspecies are listed in the Catalog of Life.

Cinnamomum talawaense is a species of tree in the laurel family (Lauraceae). It is endemic to islands in the Bismarck Archipelago in Papua New Guinea. In 2020 it was classified as being critically endangered.

Ponapea hentyi is a species of palm tree. It is endemic to New Britain in the Bismarck Archipelago of Papua New Guinea. It is threatened by habitat loss. The species was first described as Ptychosperma hentyi by Frederick Burt Essig in 1987. The Latin specific epithet of hentyi refers to plant collector and botanist E.E. Henty, (fl. 1969). In 2011 Carl E. Lewis and Scott Zona placed the species in genus Ponapea as P. hentyi.

Holochlamys is a monotypic genus of flowering plants in the family Araceae. Holochlamys beccarii is the only species in the genus Holochlamys. It is native to New Guinea and the Bismarck Archipelago and is found growing in mud near lowland streams or rocky streambeds at high elevations. The species is primarily rheophytic and closely related to the genus Spathiphyllum. Holochlamys closely resemble Spathiphyllum except that in Holochamys the spathe clasps the spadix. Also, the inflorescence rots quickly after flowering which doesn't occur in Spathiphyllum. The inflorescence emerges below the

Cycas bougainvilleana is a species of cycad in the genus Cycas, native to the islands northeast of Papua New Guinea, on New Britain, the Bismarck Archipelago and the Solomon Islands, where it occurs on or near the coast in calcareous coral sand dunes and in adjacent forests. The stems are erect, up to 5 m tall, with a crown of numerous leaves. The leaves are 2.4-2.7 m long, pinnate, with 130-260 leaflets; they are densely white to orange tomentose at first, eventually glabrous, glossy bright green. The leaflets are 25–34 cm long and 13–18 mm wide, and angled forward at 60-80° degrees. The

Dendrobium cuthbertsonii is a species of orchid in the genus Dendrobium. It grows epiphytically at up to 10,000 feet (3,000 m) above sea level in New Guinea and the Bismarck Archipelago. It is targeted by commercial collectors who harvest it for export. It has one of the longest floral durations of any orchid, with individual flowers remaining open for up to nine months. Another source says ten months. Its stems are 1–2 centimetres (0.4–0.8 in) tall and 4–7 millimetres (0.16–0.28 in) wide; the flowers are 25–40 mm (1.0–1.6 in) long, 13–35 mm (0.5–1.4 in) wide, and extremely variable in

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

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

Ponapea is a genus of palms which is native to certain islands in the western Pacific. The genus consists of four species, and has often been considered to be part of the genus Ptychosperma. Three of the species are endemic to the Caroline Islands, the fourth to the Bismarck Archipelago. Ponapea hentyi (Essig) C.Lewis & Zona - New Britain Ponapea hosinoi Kaneh. - Pohnpei Ponapea ledermanniana Becc. - Caroline Islands Ponapea palauensis Kaneh. - Palau