Martin Roy Cheek

Nepenthes aristolochioides is a tropical pitcher plant endemic to Sumatra, where it grows at elevations of 1800–2500 m above sea level. It has an extremely unusual pitcher morphology, having an almost vertical opening to its traps. It is critically endangered by overcollection. The specific epithet aristolochioides is formed from the genus name Aristolochia and the Latin ending -oides, meaning "resembling". It refers to the similarity that the pitchers of this species bear, in both shape and pigmentation, to the specialised flowers of Aristolochia.

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.

Nepenthes lamii is a tropical pitcher plant endemic to New Guinea, where it grows at an altitude of up to 3,520 m above sea level, higher than any other Nepenthes species. Although once confused with N. vieillardii and previously regarded as conspecific with the closely related N. monticola, it is now recognised as a distinct species. The specific epithet lamii honours Dutch botanist Herman Johannes Lam, who made one of the earliest known collections of this species.

Nepenthes argentii (; after George Argent) is a highland Nepenthes pitcher plant native to Mount Guiting-Guiting on Sibuyan Island in the Philippines. It is possibly the smallest species in the genus and does not appear to have a climbing stage.

Nepenthes diatas ( nih-PEN-theez dy-AT-əs; from Indonesian di atas "above, on top") is a tropical pitcher plant endemic to Sumatra, where it grows at an altitude of 2,000–2,900 metres (6,600–9,500 ft) above sea level. No forms or varieties of N. diatas have been described.

Nepenthes danseri (; after B. H. Danser, botanist) is a species of tropical pitcher plant. It is known only from the northern coast of Waigeo Island; plants from Halmahera, the largest of the Maluku Islands, are now recognised as belonging to a separate species, N. halmahera. Nepenthes danseri was formally described in 1997 by Matthew Jebb and Martin Cheek in their monograph "A skeletal revision of Nepenthes (Nepenthaceae)", published in the botanical journal Blumea. However, the name N. danseri had already been in use since at least 1994.

Psychotria bimbiensis is a species of plant in the family Rubiaceae. It is endemic to Cameroon. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss.

Nepenthes thai is a tropical pitcher plant endemic to peninsular Thailand. It grows on limestone hills at elevations of 500–600 m above sea level. Nepenthes thai has no known natural hybrids.

Nepenthes robcantleyi, or Robert Cantley's pitcher plant, is a tropical pitcher plant endemic to the Philippine island of Mindanao. It is closely allied to N. truncata and was once considered a dark, highland form of this species. Nepenthes veitchii from Borneo is also thought to be a close relative. The pitchers of N. robcantleyi are exceptionally large, reaching 40 cm in length by 10 cm in width. The inflorescence, at up to 2.5 m long, is the tallest among known Nepenthes species. The plant itself does not grow very tall, however, and is not known to climb. The specific epithet robcantleyi

Nepenthes hurrelliana (synonymous with Nepenthes mollis) is a tropical pitcher plant endemic to Borneo, where it has been recorded from northern Sarawak, southwestern Sabah, and Brunei. It is of putative hybrid origin; its two original parent species are thought to be N. fusca and N. veitchii. A thick indumentum of rusty-brown hairs covers the entire plant, a characteristic presumably inherited from the latter.

Oxyanthus okuensis is a species of plant in the family Rubiaceae. It is endemic to Cameroon. Its natural habitat is subtropical or tropical dry forests. It is threatened by habitat loss.

Nepenthes murudensis , or the Murud pitcher-plant, is a tropical pitcher plant endemic to Mount Murud in Borneo, after which it is named. It is of putative hybrid origin: its two original parent species are thought to be N. reinwardtiana and N. tentaculata.

Nepenthes mira (; from Latin mirus "wonderful") is a highland pitcher plant endemic to Palawan in the Philippines. It grows at elevations of 1,550–1,605 m above sea level. Nepenthes mira was formally described by Matthew Jebb and Martin Cheek in 1998. The authors suggest that N. mira is related to the Bornean species N. edwardsiana, N. macrophylla, and N. villosa. In his Carnivorous Plant Database, taxonomist Jan Schlauer treats this species as a heterotypic synonym of N. deaniana. Nepenthes mira has no known natural hybrids. No forms or varieties have been described.

Drosera slackii is a subtropical sundew native to the Cape Provinces of South Africa. It forms rosettes that range from to two to four inches in diameter, and produces pink flowers. It is named after the British plantsman and author Adrian Slack (1933-2018). Drosera slackii is a recipient of the Royal Horticultural Society's Award of Garden Merit.

Uvariopsis dicaprio is a species of tropical evergreen tree in the genus Uvariopsis. It is endemic to the Ebo Forest, in the Littoral Region of Cameroon. It was the first new plant species described in 2022, and was named after American actor Leonardo DiCaprio by botanists Martin Cheek and George Gosline, from the Royal Botanic Gardens, Kew. U. dicaprio is classified as Critically Endangered in the IUCN Red List.

Cola cecidiifolia is a species of flowering plant in the Family Malvaceae. It is found only in Cameroon. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss.

Belonophora ongensis is a species of flowering plant in the family Rubiaceae. It is native to Gabon and Cameroon. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss.

Tricalysia lejolyana is a species of plant in the family Rubiaceae. It is endemic to Cameroon. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss.

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Phyllanthus nyale is a species of plant in the family Phyllanthaceae. It is endemic to Cameroon. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss.

Phyllanthus caesiifolius is a species of plant in the family Phyllanthaceae. It is endemic to Cameroon. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss.

Nepenthes ramos is a tropical pitcher plant native to the northeastern Mindanao, Philippines. It is known from only a handful of herbarium specimens collected in 1919 at an elevation of 670 m above sea level. It likely grows in the forest on ultramafic soils. Nepenthes ramos belongs to the informal "N. alata group", which also includes N. alata, N. ceciliae, N. copelandii, N. extincta, N. graciliflora, N. hamiguitanensis, N. kitanglad, N. kurata, N. leyte, N. mindanaoensis, N. negros, N. saranganiensis, and N. ultra. These species are united by a number of morphological characters, including

Impatiens frithii is a species of flowering plant in the family Balsaminaceae. It is endemic to Cameroon, where it has been found in the Bakossi Mountains and on Etinde, part of Mount Cameroon. It is an epiphyte growing on small trees and shrubs in elfin forest habitat. It is small and inconspicuous when not bearing its bright red flowers.

Impatiens etindensis is a species of flowering plant in the family Balsaminaceae. It is endemic to Cameroon, where it is known only from Mount Cameroon. It grows as an epiphyte on trees in mountain forest habitat.

Cola suboppositifolia is a species of flowering plant in the family Malvaceae. It is found only in Cameroon. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss.

Cola metallica is a species of flowering plant in the family Malvaceae. It is found only in Cameroon. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss.