Nepenthes ampullaria is a very distinctive and widespread species of tropical pitcher plant, present in Borneo, the Maluku Islands, New Guinea, Peninsular Malaysia, Singapore, Sumatra, and Thailand.
Dr. Charles M. Clarke is an ecologist and botanist specialising in the carnivorous plant genus Nepenthes, for which he is regarded as a world authority. Clarke has an honours degree in Botany from Monash University in Melbourne, and a Ph.D. in Ecosystem management at the University of New England, in Armidale, New South Wales.
Nepenthes clipeata, or the shield-leaved pitcher-plant, is a tropical pitcher plant known only from the near-vertical granite cliff faces of Mount Kelam in West Kalimantan, Indonesia. It has an elevational distribution between approximately 600 and 800 m.
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.
Nepenthes benstonei is a tropical pitcher plant endemic to Peninsular Malaysia, where it grows at elevations of 150–1350 m above sea level. The specific epithet benstonei honours botanist Benjamin Clemens Stone, who was one of the first to collect the species.
Nepenthes eustachya is a tropical pitcher plant endemic to Sumatra, where it grows from sea level to an elevation of 1600 m. The specific epithet eustachya, formed from the Greek words eu (true) and stachys (spike), refers to the racemose structure of the inflorescence.
Nepenthes dubia is a tropical pitcher plant endemic to the Indonesian island of Sumatra, where it grows at an altitude of 1600–2700 m above sea level. The specific epithet dubia is the Latin word for "doubtful".
Nepenthes talangensis is a tropical pitcher plant endemic to Sumatra, where it grows in upper montane forest at elevations of 1800–2500 m above sea level.
Nepenthes mikei is a tropical pitcher plant endemic to Sumatra. It is characterised by its black mottled lower and upper pitchers. The species is closely related to N. angasanensis and N. tobaica.
Nepenthes inermis is a tropical pitcher plant endemic to the Indonesian island of Sumatra. The specific epithet inermis is Latin for "unarmed" and refers to the upper pitchers of this species, which are unique in that they completely lack a peristome.
Nepenthes izumiae is a tropical pitcher plant endemic to Sumatra, where it grows in montane forest at 1700–1900 m above sea level. It appears to be most closely related to N. lingulata and N. singalana.
Nepenthes beccariana is a tropical pitcher plant. The species was described in 1908 by John Muirhead Macfarlane based on a specimen collected from the island of Nias, which lies off the western coast of Sumatra. It appears to be closely related to both N. longifolia and N. sumatrana, and the former is possibly a heterotypic synonym of this taxon.
Nepenthes × sharifah-hapsahii is a natural hybrid between N. gracilis and N. mirabilis. It has been recorded from Borneo, Peninsular Malaysia, Sumatra, and Thailand, although it was originally described as a species endemic to Peninsular Malaysia, where it was said to grow at elevations below 1000 m.
Nepenthes peltata is a tropical pitcher plant known only from the upper slopes of Mount Hamiguitan on the island of Mindanao in the Philippines. It is characterised by a peltate tendril attachment and conspicuous indumentum. The species typically produces ovoid pitchers with a prominent basal crest and large nectar glands on the lower surface of the lid.
Nepenthes kerrii is a tropical pitcher plant native to Tarutao National Marine Park in southern Thailand, where it grows at elevations of 400–500 m above sea level. The 2018 IUCN assessment also considers the taxon found on Langkawi Island of Malaysia to be conspecific. This species is thought to be most closely related to N. kongkandana. The specific epithet kerrii refers to Irish medical doctor Arthur Francis George Kerr, who made the first known herbarium collection of this species.
"A skeletal revision of Nepenthes (Nepenthaceae)" is a monograph by Matthew Jebb and Martin Cheek on the tropical pitcher plants of the genus Nepenthes. It was published in the May 1997 issue of the botanical journal Blumea. The work represented the first revision of the entire genus since John Muirhead Macfarlane's 1908 monograph. Jebb and Cheek's revision was based on "collaborative work by both authors since 1984, largely on herbarium specimens, but including fieldwork in New Guinea, Indonesia, Malaysia, Singapore and Madagascar". It was a precursor to their more exhaustive 2001 monograph, "Nepenthaceae".
Nepenthes malayensis, or the striped Malayan montane pitcher plant, is a large species of carnivorous tropical pitcher plant native and endemic to eastern mountains of Peninsular Malaysia. The peristomes on both upper and lower pitchers are profusely adorned by reddish bands, or stripes, making the species rather attractive. It grows close to mountain summits around 800–1000 m above sea level in partially shaded areas, though some individuals have been seen growing in open areas. The species was first observed in 2018 and initially thought to be conspecific with N. sanguinea. Nepenthes malayensis formal description was published in late 2020 in Kew Bulletin and it is one of the three Malayan species described in the same year.
Nepenthes latiffiana is a pitcher plant species from Peninsular Malaysia described in the year 2020. It has been published in Webbia Journal of Plant Taxonomy and Geography in the first issue, volume 75, and made as the cover page for that issue. This species was described by Mohd Norfaizal Ghazalli (Ph.D), Amin Asyraf Tamizi and Dome Nikong, and name after a retired Professor of Botany from Universiti Kebangsaan Malaysia - Emeritus Professor Dato' Dr. Abdul Latiff Mohamad. The description was based on materials collected from a restricted area at the type locality in Setiu, Terengganu. Nepenthes latiffiana is characterized by a combination of green-yellowish-brown (peachy) coloration and several red blotches on its lower pitchers and light green upper pitchers that have 'flap-like' structures at the sides of the mouth due to expanded structure on the lateral sides of the peristomes.
