Nepenthes spathulata is a tropical pitcher plant native to Java and Sumatra, where it grows at elevations of between 1100 and 2900 m above sea level. The specific epithet spathulata is derived from the Latin word spathulatus, meaning "spatula shaped", and refers to the shape of the lamina.
Nepenthes × kinabaluensis, or the Kinabalu pitcher-plant, is the natural hybrid between N. rajah and N. villosa. It was first collected near Kambarangoh on Mount Kinabalu, Borneo by Lilian Gibbs in 1910 and later mentioned by John Muirhead Macfarlane as "Nepenthes sp." in 1914. Although Macfarlane did not formally name the plant, he noted that "[a]ll available morphological details suggest that this is a hybrid between N. villosa and N. rajah". It was finally described in 1976 by Shigeo Kurata as N. × kinabaluensis. The name was first published in Nepenthes of Mount Kinabalu, but was a nomen nudum at the time as it lacked an adequate description and information on the type specimen. The name was subsequently published validly by Kurata in 1984.
Nepenthes angasanensis is a tropical pitcher plant species endemic to Sumatra, where it grows at an altitude of 1,400 metres (4,600 ft) to 3,100 metres (10,200 ft) above sea level. The status of this taxon is controversial as it is similar in morphology to N. mikei and N. tobaica. It has even been suggested that the taxon might represent a natural hybrid between N. densiflora and N. tobaica.
Nepenthes merrilliana is a tropical pitcher plant endemic to the Philippines. It produces some of the largest pitchers in the genus, rivalling those of N. rajah.
Nepenthes paniculata is a tropical pitcher plant belonging to the genus Nepenthes.
Nepenthes spectabilis is a tropical pitcher plant endemic to Sumatra, where it grows at elevations of between 1400 and 2200 m above sea level. The specific epithet spectabilis is Latin for "visible" or "notable".
Nepenthes deaniana is a tropical pitcher plant endemic to the Philippines, where it grows at an altitude of 1180–1296 m above sea level. The species is known only from the summit region of Thumb Peak, a relatively small, ultramafic mountain in Puerto Princesa Province, Palawan.
Nepenthes × trusmadiensis, or the Trus Madi Pitcher-Plant, is a natural hybrid of two famous Bornean pitcher plant species: N. lowii and N. macrophylla. It is restricted to Mount Trus Madi, where both of its parent species are sympatric.
Nepenthes × hookeriana, or Hooker's pitcher-plant, is a common natural hybrid involving N. ampullaria and N. rafflesiana. It was originally described as a species.
Nepenthes × trichocarpa, the dainty pitcher-Plant, is a common natural hybrid involving N. ampullaria and N. gracilis. It was originally thought to be a distinct species and was described as such.
Nepenthes × cincta is a natural hybrid between N. albomarginata and N. northiana.
Nepenthes × pyriformis is a natural hybrid involving N. inermis and N. talangensis. It is known only from Mount Talang in Sumatra, to which N. talangensis is endemic. Nepenthes talangensis was only described as a distinct species in 1994. Prior to this it was placed within N. bongso and some of the older literature identifies this hybrid as N. bongso × N. inermis.
Nepenthes × sarawakiensis is a natural hybrid involving N. muluensis and N. tentaculata. It is quite a rare plant as one of its parent species, N. muluensis, is only known from several isolated mountains.
Nepenthes × merrilliata is a natural hybrid involving N. alata and N. merrilliana. Like its two parent species, it is endemic to the Philippines, but limited by the natural range of N. merrilliana to Samar as well as Mindanao and its offshore islands.
Nepenthes × ventrata is a natural hybrid involving N. alata and N. ventricosa. Like its two parent species, it is endemic to the Philippines. The name was originally published in the Carnivorous Plant Newsletter in 1979.
Nepenthes × ferrugineomarginata is a natural hybrid between N. albomarginata and N. reinwardtiana. It has been recorded from the islands of Borneo and Sumatra. The type specimen was collected by Shigeo Kurata in Kenukat, West Kalimantan, in 1981. Kurata described the hybrid the following year. The name is a nomen invalidum as it was published without a Latin description.
Nepenthes × pangulubauensis is a natural hybrid between N. mikei and N. gymnamphora. It is endemic to the Indonesian island of Sumatra.
Nepenthes × mirabilata is a natural hybrid involving N. alata and N. mirabilis.
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.
