Common swamp pitcher-plant (Nepenthes mirabilis) is a carnivorous plant native to continental Southeast Asia and all major islands of the Malay Archipelago. This plant requires high humidity and high temperatures for optimal growth. “Mirabilis” comes from the Latin word for “wonderful.”

Nepenthes rafflesiana is a scrambling vine. The stem may climb to a height of 15 m and is up to 10 mm thick. Internodes are up to 20 cm long. Tendrils may be over 110 cm long. The lower pitchers of N. rafflesiana are bulbous and possess well-developed fringed wings. These terrestrial traps rarely exceed 20 cm in height, although the giant form of N. rafflesiana is known produce pitchers up to 35 cm long and 15 cm wide. Upper pitchers are funnel-shaped and often bear a distinctive raised section at the front of the peristome. Both types of pitchers have a characteristically elongated peristome neck that may be 3 cm or more in length. Pitcher colouration varies greatly from dark purple to almost completely white. The typical form of N. rafflesiana is light green throughout with heavy purple blotches on the lower pitchers and cream-coloured aerial pitchers. The inflorescence is a raceme and grows between 16 and 70 cm tall. The red or purple flowers usually occur singly, or sometimes in pairs, on each flower-stalk. Young plants are wholly covered with long, caducous, brown or white hairs. Mature plants often have a sparse indumentum of short, brown hairs, though they may be completely glabrous.

Nepenthes gracilis (/nɪˈpɛnθiːz ˈɡræsɪlɪs/; from Latin: gracilis "slender"), or the slender pitcher-plant, is a common lowland pitcher plant that is widespread in the Sunda region. It has been recorded from Borneo, Cambodia, Peninsular Malaysia, Singapore, Sulawesi, Sumatra, and Thailand. The species has a wide altitudinal distribution of 0 to 1100 m (and perhaps even 1700 m) above sea level, although most populations are found below 100 m and plants are rare above 1000 m. Despite being a widespread plant, natural hybrids between N. gracilis and other species are quite rare. Nepenthes gracilis was formally described by Pieter Willem Korthals in his 1839 monograph, "Over het geslacht Nepenthes". Nepenthes abgracilis from the Philippines is named for its superficial similarity to this species.

Not content with being a carnivorous fly-trapping killer, the fanged pitcher-plant has fangs as well. And these 'fangs' serve a purpose - holding drops of nectar above the pitcher trap to attract insects, which then slip into the bowl and are digested. This plant is native to Borneo, but its amazing properties make it a popular plant with specialist gardeners.

Due to its unique pitcher morphology and unusual growth habit, it is difficult to confuse N. ampullaria with any other species in the genus. Francis Ernest Lloyd translated Troll's 1932 account of this species as follows: "I came across N. ampullaria among the massive vegetations of a swamp-forest on the island of Siberut off the west coast of Sumatra. It was a fabulous, unforgettable sight. Everywhere, through the network of lianas the peculiarly-formed pitchers of this species gleamed forth, often in tight clusters and, most remarkably, the muddy moss-overgrown soil was spotted with the pitchers of this plant, so that one got the impression of a carpet." The stem of N. ampullaria is light brown in colour and may climb to 15 m in height. Leaves are light green, up to 25 cm long, and 6 cm wide. Pitchers are produced at the ends of short tendrils no more than 15 cm long. The urceolate pitchers are generally quite small, rarely exceeding 10 cm in height and 7 cm in width. The peristome is greatly incurved, with the inner section accounting for around 85% of its total cross-sectional surface length. Upper pitchers are very rarely produced and are considerably smaller than those formed on rosettes or offshoots. Pitchers range in colouration from light green throughout to completely dark red, with many intermediate forms recorded. The pitchers of N. ampullaria from Sumatra and Peninsular Malaysia are almost exclusively green throughout or green with red speckles; the red forms are mostly confined to Borneo. A large-pitchered form has been recorded from New Guinea. The inflorescence of N. ampullaria is a dense panicle. It is the only Nepenthes species recorded from Sumatra or Peninsular Malaysia that produces paniculate inflorescences. All parts of the plant are densely covered with short, brown hairs when young. The indumentum of mature plants is more sparse, except on the inflorescenes.

Nepenthes villosa is a weak climber, rarely exceeding 60 cm (24 in) in height, although the stem may grow to 8 m (26 ft) in length and 10 mm (0.4 in) in diameter. Internodes are cylindrical and up to 10 cm (4 in) long. Leaves are coriaceous and petiolate. The lamina is spathulate to oblong and may be up to 25 cm (10 in) long and 6 cm (2.4 in) wide. The apex of the lamina is emarginate. The petiole is canaliculate, up to 10 cm (3.9 in) long, and bears an amplexicaul sheath. One to three longitudinal veins are present on either side of the midrib. Tendrils may reach 50 cm (20 in) in length. Lower and upper pitchers are very similar. They are urceolate to ovate in shape. The pitchers grow up to 25 cm (10 in) high and 9 cm (3.5 in) wide. A pair of fringed wings (≤15 mm wide) runs down the front of the pitcher, although it may be reduced to ribs in aerial traps. The pitcher mouth is oblique and elongated into a neck at the rear. The glands on the inner surface are overarched and occur at a density of 200 to 1300 per square cm (30 to 200 per square in). The peristome is cylindrical in cross section and up to 20 mm (0.8 in) wide. It bears well developed teeth and ribs. The lid or operculum is cordate and has a pointed apex. It has a pair of prominent lateral veins. An unbranched spur, ≤ 20 mm (0.8 in) long, is inserted at the base of the lid. Nepenthes villosa has a racemose inflorescence. The peduncle may be up to 40 cm (16 in) long, while the rachis grows to 20 cm (8 in) in length. Pedicels are filiform-bracteolate and up to 15 mm (0.6 in) long. Sepals are round to elliptic and up to 4 mm (0.2 in) long. A study of 490 pollen samples taken from two herbarium specimens (J.H.Adam 1124 and J.H.Adam 1190, collected at an elevation of 1,800–3,400 m (5,900–11,200 ft)) found the mean pollen diameter to be 37.2 μm (SE = 0.2; CV = 6.7%). The species has a dense indumentum of long, brown hairs that covers all parts of the plant.

Nepenthes veitchii (/nɪˈpɛnθiːz ˈveɪtʃiaɪ, - ˈviːtʃ-/; 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. 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. veitchii in The Gardeners' Chronicle as follows: Now as to N. Veitchii. This is a true epiphyte. I never met with it on the ground anywhere, but in great quantity 20—100 feet high on tree trunks. Its distichous habit is unique, I fancy, and then some of the leaves actually clasp around the tree just as a man would fold his arms around it in similar circumstances. No other species of Nepenthes, so far as I know, has this habit. Odoardo Beccari found N. veitchii on the top of Mount Santubong in 1865. He wrote the following account of his discovery: This is one of the finest and rarest of all pitcher-plants. ... Some of the specimens I got measured quite ten inches in length. The mouth of the pitcher in this species is certainly its most conspicuous and remarkable part by reason of its rich orange colour and its vertical position. It is also a perfect trap to entice insects into its interior, attracting them from a distance by its bright colours. Sir Joseph Hooker compares the mouth of the pitchers of N. veitchii to the gills of a fish, to which, indeed, with their narrow lamellae converging to the centre, they bear considerable resemblance. Nepenthes veitchii is thought to be closely related to N. robcantleyi from the Philippines. It has also been compared to N. truncata.

Low's pitcher plant is a tropical pitcher plant notable for its symbiotic relationship with tree shrews. Its unique upper pitchers feature a lid and a rim that serve as a platform for the shrews while feeding on exudates produced by the plant, which in turn captures the animal's waste as a nutrient source. This ingenious adaptation exemplifies how low's pitcher plant thrives in nutrient-poor rainforest habitats.

Nepenthes glabrata is a tropical pitcher plant known for its striking, elongate traps that dangle from tendrils. These carnivorous features allow nepenthes glabrata to supplement nutrient-poor soil by capturing insects. It sports a compact rosette of glossy leaves and thrives high in the montane forests. The plant’s elevation contributes to its miniature size, with pitchers often showing a delicate transparency.

Nepenthes albomarginata is a climbing plant. The stem may reach lengths of up to 4 metres (13 ft) and is up to 5 millimetres (0.20 in) in diameter. Internodes are cylindrical in cross section and up to 15 centimetres (5.9 in) long. Leaves are coriaceous in texture. The lamina or leaf blade is lanceolate in shape and up to 25 centimetres (9.8 in) long by 2 centimetres (0.79 in) wide. It has an acute apex and its base is gradually attenuate and amplexicaul. The leaves of this species are characteristic in that they completely lack a petiole. Longitudinal veins are indistinct. Tendrils are up to 20 centimetres (7.9 in) long. Rosette and lower pitchers are bulbous in the basal third and cylindrical above. They are relatively small, reaching only 15 centimetres (5.9 in) in height by 4 centimetres (1.6 in) in width. A pair of fringed wings up to 5 millimetres (0.20 in) wide runs down the front of each pitcher. The pitcher mouth is round and rises to form a short neck at the rear. The peristome is cylindrical in cross section, up to 2 millimetres (0.079 in) wide, and bears indistinct teeth. The inner portion of the peristome accounts for around 34% of its total cross-sectional surface length. A dense band of short white trichomes is present directly below the peristome, although these may be missing from pitchers that have caught termites. The glandular region covers the bulbous portion of the pitcher's inner surface. The lid or operculum is suborbicular and lacks appendages. An unbranched spur (≤3 millimetres (0.12 in) long) is inserted near the base of the lid. Upper pitchers are similar to their lower counterparts in most respects. They are cylindrical-infundibular throughout and have a pair of ribs in place of wings. Nepenthes albomarginata has a racemose inflorescence that is usually longer in male plants. The peduncle is up to 25 centimetres (9.8 in) long, while the rachis reaches lengths of up to 40 centimetres (16 in). Partial peduncles are one- or two-flowered, up to 30 millimetres (1.2 in) long, and lack a bract. Sepals are obovate to oblong in shape and up to 4 millimetres (0.16 in) long. A study of 120 pollen samples taken from a herbarium specimen (J.H.Adam 2417, collected in Borneo at an altitude of 0–30 metres (0–98 ft)) found the mean pollen diameter to be 31.8 μm (0.00125 in) (SE = 0.4; CV = 6.2%). Most parts of the plant are covered in a dense indumentum of very short, stellate white hairs. However, the underside of the lamina bears a dense covering of long hairs.