Flora of Borneo

Nepenthes rajah is a carnivorous pitcher plant species of the family Nepenthaceae. It is endemic to Mount Kinabalu and neighbouring Mount Tambuyukon in Sabah, Malaysian Borneo. Nepenthes rajah grows exclusively on serpentine substrates, particularly in areas of seeping ground water where the soil is loose and permanently moist. The species has an altitudinal range of 1,500–2,650 m (4,920–8,690 ft) above sea level and is thus considered a highland or sub-alpine plant. Due to its localised distribution, N. rajah is classified as an endangered species by the IUCN and listed on CITES Appendix I.

Artocarpus odoratissimus, commonly known as marang, tarap, terap or less common, johey oak, is a species of flowering plant in the Moraceae family. It is native to Borneo from where has been introduced to the Philippines. It is closely related to the jackfruit, cempedak, and breadfruit trees which all belong to the same genus, Artocarpus.

Mangifera casturi (also called Kalimantan mango or kasturi) is a species of plant in the family Anacardiaceae. It was endemic to the Kalimantan region of Borneo, but is now considered extinct in the wild.

Nepenthes villosa , or the villose pitcher-plant, is a tropical pitcher plant endemic to Mount Kinabalu and neighbouring Mount Tambuyukon in northeastern Borneo. It grows at higher elevations than any other Bornean Nepenthes species, occurring at elevations of over 3,200 m (10,500 ft). Nepenthes villosa is characterised by its highly developed and intricate peristome, which distinguishes it from the closely related N. edwardsiana and N. macrophylla. The specific epithet villosa is Latin for "hairy" and refers to the dense indumentum of this species.

Nepenthes veitchii (; after James Veitch, nurseryman of the Veitch Nurseries), or Veitch's pitcher-plant, is a Nepenthes species from the island of Borneo. The plant is widespread in north-western Borneo and can also be found in parts of Kalimantan. It grows in lowland Dipterocarp forest, typically near rivers, and on ridgetops in mossy forests, from 0 to 1,600 meters elevation. Nepenthes veitchii usually grows as an epiphyte, though the form from Bario seems to be strictly terrestrial and has not been observed to climb trees. Frederick William Burbidge described the growth habit of N.

Nepenthes lowii, commonly called Low's pitcher plant, is a tropical pitcher plant endemic to Borneo. It is named after Hugh Low, who discovered it on Mount Kinabalu. This species is perhaps the most unusual in the genus, being characterised by its strongly constricted upper pitchers, which bear a greatly reduced peristome and a reflexed lid with numerous bristles on its lower surface.

Nepenthes bicalcarata (; from Latin for "two-spurred"), also known as the fanged pitcher-plant, is a tropical pitcher plant which is endemic to Borneo. It is a vine up to 40 m (130 ft) length. It is a myrmecophyte noted for its mutualistic association with a species of ant, Camponotus schmitzi. As an ant-fed plant it lacks many of the features that characterise the carnivorous syndrome in Nepenthes, including viscoelastic and highly acidic pitcher fluid, the waxy zone of the pitcher interior, and possibly even functional digestive enzymes.

The genus Paraphalaenopsis, abbreviated as Prphln in horticultural trade, is a member of the orchid family (Orchidaceae), consisting of 4 species endemic to Borneo and one natural (unconfirmed) hybrid, Paraphalaenopsis × thorntonii (P. denevei × P. serpentilingua). Named by American botanist Alex Drum Hawkes. They are morphologically similar to Phalaenopsis and were a long time considered as species of that genus. Their flowers are similar, but the leaves of Paraphalaenopsis are cylindrical and long (from 35 cm up to 3m in cultivation). This latter measurement belongs to the "rat-tail orchid"

Nepenthes campanulata (; from Late Latin campānulātus "bell-shaped"), the bell-shaped pitcher-plant, is a tropical pitcher plant native to Borneo. It has also been reported from Palawan, the Philippines, though further field work is needed to confirm this identification. Forest fires destroyed the only known population of N. campanulata in 1983 and it was uncertain whether the species had survived elsewhere or was in fact extinct. It was rediscovered in 1997, several hundred kilometres from the type locality. Nepenthes campanulata is listed as Vulnerable on the 2014 IUCN Red List of

Rafflesia keithii is a parasitic flowering plant in the genus Rafflesia endemic to Sabah in Borneo. The flowers can grow up to one metre in diameter. It is named after Henry (Harry) George Keith, former Conservator of Forests in North Borneo (now Sabah).

Mangifera pajang, commonly known as wild mango, is a species of tree in the family Anacardiaceae. It is endemic to Borneo, where it is known by the various native names: buah bambangan, buah mawang and buah embang.

Phalaenopsis bellina is an orchid endemic to Borneo. It is one of 75 species of Phalaenopsis and one of the most commonly cultivated species in the genus.

Nepenthes northiana , or Miss North's pitcher-plant, is a tropical pitcher plant endemic to Borneo, where it grows at elevations ranging from 0 to 500 m above sea level. The specific epithet northiana honours the English botanic illustrator Marianne North, who first depicted the species. Nepenthes northiana is one of the most famous Nepenthes, and its discovery in the latter half of the 19th century contributed to Sarawak's reputation as a land of spectacular exotic plants.

Nepenthes hirsuta (; from Latin: hirsūtus "hairy, bristly"), the hairy pitcher-plant, is a tropical pitcher plant endemic to Borneo. It is characterised by an indumentum of thick brown hairs, which is even present on the inflorescence. Pitchers are mostly green throughout with some having red blotches on the inside surfaces. N. hirsuta grows at an elevation of 200–1,100 m. It is present in a wide range of habitats, including kerangas forest, mossy banks in lower montane forest, open areas, and disturbed vegetation on lower ridges. It grows mostly on sandstone substrates.

Nepenthes fusca , or the dusky pitcher-plant, is a tropical pitcher plant endemic to Borneo. It is found throughout a wide altitudinal range and is almost always epiphytic in nature, primarily growing in mossy forest. The specific epithet fusca is derived from the Latin word fuscus, meaning "dark brown" or "dusky", and refers to the colour of the pitchers.

Nepenthes edwardsiana , or the splendid pitcher-plant, is a carnivorous tropical pitcher plant endemic to Mount Kinabalu and neighbouring Mount Tambuyukon in Sabah, Malaysian Borneo. It is considered one of the most spectacular of all Nepenthes, producing some of the largest pitchers and the most highly developed peristome ribs of any species in the genus.

Nepenthes chaniana (; after Datuk Chan Chew Lun, Managing Director of Natural History Publications) is a tropical pitcher plant species belonging to the genus Nepenthes. It is characterised by a dense indumentum of long, white hairs. Pitchers are cylindrical and mostly white to yellow in colouration. Nepenthes chaniana belongs to the loosely defined "N. maxima complex", which also includes, among other species, N. boschiana, N. epiphytica, N. eymae, N. faizaliana, N. fusca, N. klossii, N. maxima, N. platychila, N. stenophylla, and N. vogelii. Cultivated plants of this species were for a long

Durio kutejensis, commonly known as durian pulu, durian merah, nyekak, pakan, kuluk, or lai, is a primary rainforest substorey fruit tree from Borneo.

Durio dulcis, known as durian marangang (or merangang), red durian, tutong, or lahung, is a fairly large tree in the genus Durio. It can grow up to 40 m tall. The husk of its fruit is dark red to brown-red, and covered with slender 15–20 mm long spines. The fruit flesh is dark yellow, thin, and deep caramel-flavored, with a turpentine odor. The fruit of this species is considered by many to be the sweetest of all durians.

Bucephalandra is a genus of flowering plants in the family Araceae. There are 30 species of Bucephalandra which have been discovered in Borneo and have been formally described by S.Y. Wong and P.C. Boyce. So far, all described species have only been recorded from Borneo. Bucephalandra are usually found growing as dense mats over stones or rocks in streams or rivers in moist tropical forest.

Rafflesia pricei is a parasitic flowering plant endemic to Borneo. It is named after amateur botanist William Price, who discovered the species on Mount Kinabalu in the 1960s. The Rafflesia Forest Reserve was established mainly to protect the species.

Nepenthes stenophylla , or the narrow-leaved pitcher-plant, is a tropical pitcher plant endemic to Borneo and occurs at elevations of 900–2,100 m (3,000–7,000 ft). The species produces attractive funnel-shaped pitchers up to 25 cm high. It is listed as Least Concern on the IUCN Red List. Nepenthes stenophylla belongs to the loosely defined "N. maxima complex", which also includes, among other species, N. boschiana, N. chaniana, N. epiphytica, N. eymae, N. faizaliana, N. fusca, N. klossii, N. maxima, N. platychila, and N. vogelii.

Nepenthes burbidgeae , also known as the painted pitcher plant or Burbidge's Pitcher-Plant, is a tropical pitcher plant with a patchy distribution around Mount Kinabalu and neighbouring Mount Tambuyukon in Sabah, Borneo.

Caryota no is a species of flowering plant in the family Arecaceae. It is endemic to the Island of Borneo. Its specific epithet is from the common name in Malaysian, cajù nó. It is called baroch by the Dayak people of Singhi. The fibers, which are used for fishing lines or woven into baskets, are called talì onus. The extremely hard wood is also used like similar species.

Aridarum is a genus of flowering plants in the family Araceae. All of the known species in this genus are rheophytic and are endemic to the Island of Borneo. The plant is aquatic and has willow-shaped leaves that are able to take strong currents without sustaining damage.

Thismia neptunis is a species of Thismia endemic to Borneo. It was discovered by Italian botanist Odoardo Beccari in 1866, and described in 1878. It was not observed again until 2017, when it was first photographed by a team of biologists from the Czech Republic. It was found in the Gunung Matang massif in western Sarawak, in the Malaysian part of the island of Borneo. T. neptunis lives underground, and is a myco-heterotroph, a plant which obtains nutrients through a parasitic relationship with fungi. It does not bloom every year, and when it does, its flower appears above the soil for only a

Rafflesia tuan-mudae is a member of the Rafflesiaceae family. It lives as a parasite within the Tetrastigma vines. The enormous flowers may reach over 1 m in diameter. The buds normally emerge where the vine is growing along the ground, unlike some of the other Rafflesia species whose buds can emerge from vines hanging in the air.

Phalaenopsis gigantea is a species of orchid endemic to the island of Borneo and was first described in 1909. The specific epithet gigantea refers to the giant size of its fleshy leaves, which can grow to over 60 cm in length on a mature plant. It is the largest known Phalaenopsis species.

Paphiopedilum rothschildianum, commonly known as the Gold of Kinabalu orchid or Rothschild's slipper orchid, is a large, clear-leafed species of orchid. It blooms with tall inflorescence of up to six large flowers that are 5-13 inches. It is unique to the Corypetalum group for holding its petals almost horizontally, giving the flower a distinctive appearance. The peak flowering period of this plant is from April to May.

Nepenthes macrophylla , the large-leaved pitcher-plant, is a tropical pitcher plant known only from a very restrictive elevation on Mount Trusmadi in Sabah, Malaysian Borneo. Nepenthes macrophylla was once thought to be a subspecies of N. edwardsiana, but differs from that species in several aspects of pitcher and leaf morphology.