Nepenthes jacquelineae
Encyclopedia
Nepenthes jacquelineae is a tropical pitcher plant
endemic to Sumatra
. Due to its unique pitcher morphology, it is considered to be one of the most spectacular Nepenthes species native to the island.
and Troy Davis. The plants were found north of Bukittinggi
, West Sumatra
, growing at an elevation of around 1700 m. The formal description of N. jacquelineae was published in Clarke's 2001 monograph, Nepenthes of Sumatra and Peninsular Malaysia
.
Two collections of plant material were made on July 13, 2000. The herbarium specimen Clarke, Davis & Tamin 1307 was designated as the holotype
of N. jacquelineae. It consists of two sheets from two different plants: a portion of a climbing stem with an upper pitcher and a mature female inflorescence
; and an immature rosette with lower pitchers and a male inflorescence. The isotype
Clarke, Davis & Tamin 1307, collected at the same time as the holotype, consists of a single sheet with a fragment of a sterile climbing stem bearing two upper pitchers. Both specimens are deposited at the Herbarium of Andalas University
(ANDA). A third specimen, Nepenthes Team NP 384, is also deposited at the herbarium.
The species is named after Charles Clarke's wife, Jacqueline Clarke.
s are up to 10 cm long.
Leaves are sessile to sub-petiolate and have a coriaceous texture. The lamina is ovate-spathulate in form and grows to 20 cm in length and 6 cm in width. Three longitudinal veins are present on either side of the midrib together with numerous pinnate veins. Tendril
s are up to 30 cm long.
Rosette and lower pitchers are relatively small, rarely being more than 6 cm high and 4 cm wide. They are infundibular throughout and may or may not have fringed wings. They bear a wide, flattened peristome
(≤10 mm wide) which is contracted in the middle. Ribs are barely discernible, except at the front of the peristome. Terrestrial pitchers have ovate lids. Small, circular nectar gland
s (≤0.5 mm wide) are concentrated on the underside of the lid near its apex. Several very large raised glands (≤1 mm wide) are also present. An unbranched spur
(≤5 mm long) is inserted at the base of the lid.
Upper pitchers are much larger, growing up to 15 cm high and 10 cm wide. Wings are reduced to ribs that run down the front of the pitcher. The greatly expanded peristome may reach 3.5 cm in width in aerial pitchers. The lid does not cover the mouth completely, being narrowly ovate. It is up to 5 cm long and 2 cm wide. The crater-like glands on the underside of the lid may be up to 1.5 mm wide. These glands are so large that they are visible as swellings on the upper surface of the lid. The spur is simple and up to 1 cm long. Pitchers range in colour from light green to dark purple throughout and may be lightly speckled. The most common form of this species has green pitchers with a red peristome.
Nepenthes jacquelineae has a racemose
inflorescence
. In male plants, the peduncle
is up to 12 cm long and the rachis
up to 20 cm long, whereas in female plants the peduncle is up to 20 cm long and the rachis up to 10 cm long. The rachis bears one- or two-flowered partial peduncles. Sepal
s are ovate-lanceolate, up to 7 mm long, and 4 mm wide. Each male inflorescence bears approximately 100 flowers, whereas each female inflorescence bears around 60 flowers. Mature fruits are up to 2.5 cm long.
The stem and leaves of N. jacquelineae are glabrous throughout. The outer surfaces of the pitchers are covered with short, white stellate hairs. Developing pitcher buds are densely covered with simple, red-brown hairs, most of which are lost as the pitcher develops, with the exception of those on the spur. Female inflorescences usually have a denser indumentum
than male inflorescences.
that line the western side of Sumatra
. More specifically, it is known only from the Indonesia
n province of West Sumatra
. It usually occurs as an epiphyte
, but also grows terrestrially. The species has an altitudinal distribution of 1700 to 2200 m above sea level.
The typical habitat of N. jacquelineae is dense mossy forest, which is almost constantly shrouded in fog
and experiences daily rainfall. As a result, humidity levels are always high and the climate is cool. Plants are exposed to relatively low light levels, as sunlight is diffused by fog and vegetation.
The species is relatively common at the type locality
, although few seedlings and young plants have been observed there. This suggests that recruitment rates of this species may be low or episodic. In addition, the spectacular appearance of N. jacquelineae makes its wild populations particularly vulnerable to overcollection.
Nepenthes jacquelineae is not listed on the IUCN Red List of Threatened Species
. In 2001, Charles Clarke unofficially evaluated its conservation status
as Data Deficient
based to the IUCN
criteria.
Like most Nepenthes species, N. jacquelineae is primarily insectivorous
, although it does occasionally catch other types of invertebrate
s. The pitcher fluid of N. jacquelineae is extremely viscous and coats the pitcher walls. It has been suggested that the pitchers of this species function not only as pitfall traps but also as flypaper traps, with the sticky inner walls trapping flying insects above the surface of the fluid. Indeed, this trapping method is employed by the closely related N. inermis
, which also produces highly viscous pitcher fluid.
Aerial pitchers of N. jacquelineae are often filled with rainwater, which, together with the pitcher fluid, occupies two-thirds to three-quarters of the traps' volume. Conversely, the much wider lids of lower pitchers prevent rainwater from entering the pitchers and diluting the fluid. Most of the plant's prey die as a result of drowning in this fluid.
The peristome is often darker than the pitcher cup and it has been speculated that the pitchers of N. jacquelineae may act as light traps. The contrast between the dark peristome and lighter-coloured mouth may serve to attract flying insects. The pitchers of N. jacquelineae frequently catch large flying insects such as blattid cockroaches
, bee
s, and moth
s. The wide peristome may function as a kind of landing platform for such prey.
The unusually large glands on the underside of the lid produce copious amounts of nectar and likely lure insects into a precarious position over the pitcher mouth.
The lower pitchers of this species are often embedded in thick Sphagnum
moss, allowing them to trap small terrestrial animals such as snails.
, N. inermis
, N. jamban
, N. talangensis
, and N. tenuis
. It shares with these species features such as infundibulate pitchers which are wholly glandular on their inner surfaces, bract
eate inflorescences, and sessile leaves. All of these Nepenthes produce very viscous pitcher fluid.
However, N. jacquelineae has a more robust growth habit and produces consideraby larger pitchers than these species. The shape of the pitcher cup is closest to N. talangensis (minus the peristome), whereas the lid resembles that of N. tenuis, although it is broader throughout and contracted towards the base. N. jacquelineae can also be distinguished from N. tenuis by its ovate-spathulate leaf blade, as opposed to linear-lanceolate in the latter.
The large glands on the underside of the lid are unique among Sumatran Nepenthes species, and help to distinguish N. jacquelineae from related taxa
. N. jamban also possesses very large nectar glands (≤0.5 mm), but differs in having longer and one-flowered partial peduncles, and a narrower lid.
Nepenthes flava can be easily distinguished from N. jacquelineae on the basis of its ovate or oblong lid and cylindrical peristome.
The most characteristic feature of N. jacquelineae is its greatly expanded peristome, which can be up to 3.5 cm wide in upper pitchers. It is unusually smooth and only has significant ribs at the front where it is contracted. This is in stark contrast to the closely related N. inermis, which produces upper pitchers that lack a peristome completely. The only other species with a similarly expanded peristome is N. platychila
from Borneo
, although the two taxa are not otherwise related.
. It is thus not surprising that it occasionally hybridises with this species. Pitchers of N. izumiae × N. jacquelineae are reddish in colour and are usually dominated by characteristics of N. jacquelineae.
Specimens of a putative natural cross between N. dubia
and N. jacquelineae have also been recorded.
Pitcher plant
Pitcher plants are carnivorous plants whose prey-trapping mechanism features a deep cavity filled with liquid known as a pitfall trap. It has been widely assumed that the various sorts of pitfall trap evolved from rolled leaves, with selection pressure favouring more deeply cupped leaves over...
endemic to Sumatra
Sumatra
Sumatra is an island in western Indonesia, westernmost of the Sunda Islands. It is the largest island entirely in Indonesia , and the sixth largest island in the world at 473,481 km2 with a population of 50,365,538...
. Due to its unique pitcher morphology, it is considered to be one of the most spectacular Nepenthes species native to the island.
Botanical history
Nepenthes jacquelineae was discovered in July 2000 by Charles ClarkeCharles Clarke (botanist)
Dr. Charles M. Clarke is a botanist and taxonomist specialising in the carnivorous plant genus Nepenthes. 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.Clarke first...
and Troy Davis. The plants were found north of Bukittinggi
Bukittinggi
Bukittinggi is one of the larger cities in West Sumatra, Indonesia, with a population of over 91,000 people and an area of 25.24 km². It is situated in the Minangkabau highlands, 90 km by road from the West Sumatran capital city of Padang. It is located at , near the volcanoes Mount...
, West Sumatra
West Sumatra
West Sumatra is a province of Indonesia. It lies on the west coast of the island Sumatra. It borders the provinces of North Sumatra to the north, Riau and Jambi to the east, and Bengkulu to the southeast. It includes the Mentawai Islands off the coast...
, growing at an elevation of around 1700 m. The formal description of N. jacquelineae was published in Clarke's 2001 monograph, Nepenthes of Sumatra and Peninsular Malaysia
Nepenthes of Sumatra and Peninsular Malaysia
Nepenthes of Sumatra and Peninsular Malaysia is a monograph by Charles Clarke on the tropical pitcher plants of Sumatra, Peninsular Malaysia, and their minor surrounding islands. It was published in 2001 by Natural History Publications...
.
Two collections of plant material were made on July 13, 2000. The herbarium specimen Clarke, Davis & Tamin 1307 was designated as the holotype
Holotype
A holotype is a single physical example of an organism, known to have been used when the species was formally described. It is either the single such physical example or one of several such, but explicitly designated as the holotype...
of N. jacquelineae. It consists of two sheets from two different plants: a portion of a climbing stem with an upper pitcher and a mature female inflorescence
Inflorescence
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Strictly, it is the part of the shoot of seed plants where flowers are formed and which is accordingly modified...
; and an immature rosette with lower pitchers and a male inflorescence. The isotype
Isotype
Isotype can refer to:* In crystallography, an "isotype" is a synonym for isomorph* In biology, per the International Code of Botanical Nomenclature, the "isotype" is a duplicate of the holotype....
Clarke, Davis & Tamin 1307, collected at the same time as the holotype, consists of a single sheet with a fragment of a sterile climbing stem bearing two upper pitchers. Both specimens are deposited at the Herbarium of Andalas University
Andalas University
Andalas University is the oldest university in Indonesia outside of Java. The university consists of eleven faculties, with most located at the main campus Limau Manis, 12 km from the center of Padang, West Sumatra. This campus occupies 5 km², at an elevation of about 100 m. The Faculty...
(ANDA). A third specimen, Nepenthes Team NP 384, is also deposited at the herbarium.
The species is named after Charles Clarke's wife, Jacqueline Clarke.
Description
Nepenthes jacquelineae is a climbing plant. The stem, which is usually less than 5 mm thick, grows to 5 m in length and is cylindrical-angular in cross section. InternodePlant stem
A stem is one of two main structural axes of a vascular plant. The stem is normally divided into nodes and internodes, the nodes hold buds which grow into one or more leaves, inflorescence , conifer cones, roots, other stems etc. The internodes distance one node from another...
s are up to 10 cm long.
Leaves are sessile to sub-petiolate and have a coriaceous texture. The lamina is ovate-spathulate in form and grows to 20 cm in length and 6 cm in width. Three longitudinal veins are present on either side of the midrib together with numerous pinnate veins. Tendril
Tendril
In botany, a tendril is a specialized stem, leaf or petiole with a threadlike shape that is used by climbing plants for support, attachment and cellular invasion by parasitic plants, generally by twining around suitable hosts. They do not have a lamina or blade, but they can photosynthesize...
s are up to 30 cm long.
Rosette and lower pitchers are relatively small, rarely being more than 6 cm high and 4 cm wide. They are infundibular throughout and may or may not have fringed wings. They bear a wide, flattened peristome
Peristome
The word peristome is derived from the Greek peri, meaning 'around' or 'about', and stoma, 'mouth'. It is a term used to describe various anatomical features that surround an opening to an organ or structure. The term is used in plants and invertebrate animals, such as in describing the shells of...
(≤10 mm wide) which is contracted in the middle. Ribs are barely discernible, except at the front of the peristome. Terrestrial pitchers have ovate lids. Small, circular nectar gland
Gland
A gland is an organ in an animal's body that synthesizes a substance for release of substances such as hormones or breast milk, often into the bloodstream or into cavities inside the body or its outer surface .- Types :...
s (≤0.5 mm wide) are concentrated on the underside of the lid near its apex. Several very large raised glands (≤1 mm wide) are also present. An unbranched spur
Spur (biology)
A spur in botany is a spike, usually part of a flower.In certain plants, part of a sepal or petal develops into an elongated hollow spike extending behind the flower, containing nectar which is sucked by long-tongued animals . Plants with such structures include Delphinium, Aquilegia, Piperia, and...
(≤5 mm long) is inserted at the base of the lid.
Upper pitchers are much larger, growing up to 15 cm high and 10 cm wide. Wings are reduced to ribs that run down the front of the pitcher. The greatly expanded peristome may reach 3.5 cm in width in aerial pitchers. The lid does not cover the mouth completely, being narrowly ovate. It is up to 5 cm long and 2 cm wide. The crater-like glands on the underside of the lid may be up to 1.5 mm wide. These glands are so large that they are visible as swellings on the upper surface of the lid. The spur is simple and up to 1 cm long. Pitchers range in colour from light green to dark purple throughout and may be lightly speckled. The most common form of this species has green pitchers with a red peristome.
Nepenthes jacquelineae has a racemose
Raceme
A raceme is a type of inflorescence that is unbranched and indeterminate and bears pedicellate flowers — flowers having short floral stalks called pedicels — along the axis. In botany, axis means a shoot, in this case one bearing the flowers. In a raceme, the oldest flowers are borne...
inflorescence
Inflorescence
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Strictly, it is the part of the shoot of seed plants where flowers are formed and which is accordingly modified...
. In male plants, the peduncle
Peduncle (botany)
In botany, a peduncle is a stem supporting an inflorescence, or after fecundation, an infructescence.The peduncle is a stem, usually green and without leaves, though sometimes colored or supporting small leaves...
is up to 12 cm long and the rachis
Rachis
Rachis is a biological term for a main axis or "shaft".-In zoology:In vertebrates a rachis can refer to the series of articulated vertebrae, which encase the spinal cord. In this case the rachis usually form the supporting axis of the body and is then called the spine or vertebral column...
up to 20 cm long, whereas in female plants the peduncle is up to 20 cm long and the rachis up to 10 cm long. The rachis bears one- or two-flowered partial peduncles. Sepal
Sepal
A sepal is a part of the flower of angiosperms . Collectively the sepals form the calyx, which is the outermost whorl of parts that form a flower. Usually green, sepals have the typical function of protecting the petals when the flower is in bud...
s are ovate-lanceolate, up to 7 mm long, and 4 mm wide. Each male inflorescence bears approximately 100 flowers, whereas each female inflorescence bears around 60 flowers. Mature fruits are up to 2.5 cm long.
The stem and leaves of N. jacquelineae are glabrous throughout. The outer surfaces of the pitchers are covered with short, white stellate hairs. Developing pitcher buds are densely covered with simple, red-brown hairs, most of which are lost as the pitcher develops, with the exception of those on the spur. Female inflorescences usually have a denser indumentum
Indumentum
The indumentum is a covering of fine hairs or bristles on a plant or insect.In plants, the indumentum types are:*pubescent*hirsute*pilose*villous*tomentose*stellate*scabrous*scurfy...
than male inflorescences.
Ecology
Nepenthes jacquelineae is endemic to the Barisan MountainsBarisan Mountains
The Bukit Barisan or the Barisan Mountains are a mountain range on the western side of Sumatra, Indonesia, covering nearly 1,700 km from the north to the south of the island. The Bukit Barisan range consists primarily of volcanoes shrouded in dense jungle cover, including Sumatran tropical pine...
that line the western side of Sumatra
Sumatra
Sumatra is an island in western Indonesia, westernmost of the Sunda Islands. It is the largest island entirely in Indonesia , and the sixth largest island in the world at 473,481 km2 with a population of 50,365,538...
. More specifically, it is known only from the Indonesia
Indonesia
Indonesia , officially the Republic of Indonesia , is a country in Southeast Asia and Oceania. Indonesia is an archipelago comprising approximately 13,000 islands. It has 33 provinces with over 238 million people, and is the world's fourth most populous country. Indonesia is a republic, with an...
n province of West Sumatra
West Sumatra
West Sumatra is a province of Indonesia. It lies on the west coast of the island Sumatra. It borders the provinces of North Sumatra to the north, Riau and Jambi to the east, and Bengkulu to the southeast. It includes the Mentawai Islands off the coast...
. It usually occurs as an epiphyte
Epiphyte
An epiphyte is a plant that grows upon another plant non-parasitically or sometimes upon some other object , derives its moisture and nutrients from the air and rain and sometimes from debris accumulating around it, and is found in the temperate zone and in the...
, but also grows terrestrially. The species has an altitudinal distribution of 1700 to 2200 m above sea level.
The typical habitat of N. jacquelineae is dense mossy forest, which is almost constantly shrouded in fog
Fog
Fog is a collection of water droplets or ice crystals suspended in the air at or near the Earth's surface. While fog is a type of stratus cloud, the term "fog" is typically distinguished from the more generic term "cloud" in that fog is low-lying, and the moisture in the fog is often generated...
and experiences daily rainfall. As a result, humidity levels are always high and the climate is cool. Plants are exposed to relatively low light levels, as sunlight is diffused by fog and vegetation.
The species is relatively common at the type locality
Biological type
In biology, a type is one particular specimen of an organism to which the scientific name of that organism is formally attached...
, although few seedlings and young plants have been observed there. This suggests that recruitment rates of this species may be low or episodic. In addition, the spectacular appearance of N. jacquelineae makes its wild populations particularly vulnerable to overcollection.
Nepenthes jacquelineae is not listed on the IUCN Red List of Threatened Species
IUCN Red List
The IUCN Red List of Threatened Species , founded in 1963, is the world's most comprehensive inventory of the global conservation status of biological species. The International Union for Conservation of Nature is the world's main authority on the conservation status of species...
. In 2001, Charles Clarke unofficially evaluated its conservation status
Conservation status
The conservation status of a group of organisms indicates whether the group is still extant and how likely the group is to become extinct in the near future...
as Data Deficient
Data Deficient
Data Deficient is a category applied by the IUCN, other agencies, and individuals to a species when the available information is not sufficient for a proper assessment of conservation status to be made...
based to the IUCN
World Conservation Union
The International Union for Conservation of Nature and Natural Resources is an international organization dedicated to finding "pragmatic solutions to our most pressing environment and development challenges." The organization publishes the IUCN Red List, compiling information from a network of...
criteria.
Carnivory
Insectivore
An insectivore is a type of carnivore with a diet that consists chiefly of insects and similar small creatures. An alternate term is entomophage, which also refers to the human practice of eating insects....
, although it does occasionally catch other types of invertebrate
Invertebrate
An invertebrate is an animal without a backbone. The group includes 97% of all animal species – all animals except those in the chordate subphylum Vertebrata .Invertebrates form a paraphyletic group...
s. The pitcher fluid of N. jacquelineae is extremely viscous and coats the pitcher walls. It has been suggested that the pitchers of this species function not only as pitfall traps but also as flypaper traps, with the sticky inner walls trapping flying insects above the surface of the fluid. Indeed, this trapping method is employed by the closely related N. inermis
Nepenthes inermis
Nepenthes inermis is a tropical pitcher plant endemic to Sumatra. The specific epithet inermis is Latin for "unarmed" and probably refers to the upper pitchers of this species, which are unique in that they completely lack a peristome....
, which also produces highly viscous pitcher fluid.
Aerial pitchers of N. jacquelineae are often filled with rainwater, which, together with the pitcher fluid, occupies two-thirds to three-quarters of the traps' volume. Conversely, the much wider lids of lower pitchers prevent rainwater from entering the pitchers and diluting the fluid. Most of the plant's prey die as a result of drowning in this fluid.
The peristome is often darker than the pitcher cup and it has been speculated that the pitchers of N. jacquelineae may act as light traps. The contrast between the dark peristome and lighter-coloured mouth may serve to attract flying insects. The pitchers of N. jacquelineae frequently catch large flying insects such as blattid cockroaches
Blattidae
The Blattidae is a family of the order Blattaria . It contains several of the most common household cockroaches.-Selected species:*Oriental cockroach *American cockroach...
, bee
Bee
Bees are flying insects closely related to wasps and ants, and are known for their role in pollination and for producing honey and beeswax. Bees are a monophyletic lineage within the superfamily Apoidea, presently classified by the unranked taxon name Anthophila...
s, and moth
Moth
A moth is an insect closely related to the butterfly, both being of the order Lepidoptera. Moths form the majority of this order; there are thought to be 150,000 to 250,000 different species of moth , with thousands of species yet to be described...
s. The wide peristome may function as a kind of landing platform for such prey.
The unusually large glands on the underside of the lid produce copious amounts of nectar and likely lure insects into a precarious position over the pitcher mouth.
The lower pitchers of this species are often embedded in thick Sphagnum
Sphagnum
Sphagnum is a genus of between 151 and 350 species of mosses commonly called peat moss, due to its prevalence in peat bogs and mires. A distinction is made between sphagnum moss, the live moss growing on top of a peat bog on one hand, and sphagnum peat moss or sphagnum peat on the other, the...
moss, allowing them to trap small terrestrial animals such as snails.
Related species
Nepenthes jacquelineae is thought to be most closely related to N. flavaNepenthes flava
Nepenthes flava is a tropical pitcher plant endemic to northern Sumatra, where it grows in montane forest at 1800–2200 m above sea level....
, N. inermis
Nepenthes inermis
Nepenthes inermis is a tropical pitcher plant endemic to Sumatra. The specific epithet inermis is Latin for "unarmed" and probably refers to the upper pitchers of this species, which are unique in that they completely lack a peristome....
, N. jamban
Nepenthes jamban
Nepenthes jamban is a tropical pitcher plant endemic to northern Sumatra. The specific epithet jamban is the Indonesian word for "toilet" and refers to the shape of the pitchers.-Botanical history:...
, N. talangensis
Nepenthes talangensis
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....
, and N. tenuis
Nepenthes tenuis
Nepenthes tenuis is a tropical pitcher plant endemic to Sumatra. The species was first collected in 1957, from a remote mountain in the western part of the island. It remained undescribed until 1994, and was only rediscovered in the wild in 2002. Prior to this, N...
. It shares with these species features such as infundibulate pitchers which are wholly glandular on their inner surfaces, bract
Bract
In botany, a bract is a modified or specialized leaf, especially one associated with a reproductive structure such as a flower, inflorescence axis, or cone scale. Bracts are often different from foliage leaves. They may be smaller, larger, or of a different color, shape, or texture...
eate inflorescences, and sessile leaves. All of these Nepenthes produce very viscous pitcher fluid.
However, N. jacquelineae has a more robust growth habit and produces consideraby larger pitchers than these species. The shape of the pitcher cup is closest to N. talangensis (minus the peristome), whereas the lid resembles that of N. tenuis, although it is broader throughout and contracted towards the base. N. jacquelineae can also be distinguished from N. tenuis by its ovate-spathulate leaf blade, as opposed to linear-lanceolate in the latter.
The large glands on the underside of the lid are unique among Sumatran Nepenthes species, and help to distinguish N. jacquelineae from related taxa
Taxon
|thumb|270px|[[African elephants]] form a widely-accepted taxon, the [[genus]] LoxodontaA taxon is a group of organisms, which a taxonomist adjudges to be a unit. Usually a taxon is given a name and a rank, although neither is a requirement...
. N. jamban also possesses very large nectar glands (≤0.5 mm), but differs in having longer and one-flowered partial peduncles, and a narrower lid.
Nepenthes flava can be easily distinguished from N. jacquelineae on the basis of its ovate or oblong lid and cylindrical peristome.
The most characteristic feature of N. jacquelineae is its greatly expanded peristome, which can be up to 3.5 cm wide in upper pitchers. It is unusually smooth and only has significant ribs at the front where it is contracted. This is in stark contrast to the closely related N. inermis, which produces upper pitchers that lack a peristome completely. The only other species with a similarly expanded peristome is N. platychila
Nepenthes platychila
Nepenthes platychila is a species of pitcher plant endemic to the Hose Mountains of central Sarawak. It is notable for its smooth peristome and funnel-shaped upper pitchers....
from Borneo
Borneo
Borneo is the third largest island in the world and is located north of Java Island, Indonesia, at the geographic centre of Maritime Southeast Asia....
, although the two taxa are not otherwise related.
Natural hybrids
In the wild, N. jacquelineae often occurs sympatrically with N. izumiaeNepenthes izumiae
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...
. It is thus not surprising that it occasionally hybridises with this species. Pitchers of N. izumiae × N. jacquelineae are reddish in colour and are usually dominated by characteristics of N. jacquelineae.
Specimens of a putative natural cross between N. dubia
Nepenthes dubia
Nepenthes dubia is a tropical pitcher plant endemic to Sumatra. The specific epithet dubia is the Latin word for "doubtful".-Botanical history:...
and N. jacquelineae have also been recorded.