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Nepenthes: Tropical pitcher plants

Nepenthes alata

Winged tropical pitcher plant

Published October 15, 2026Awaiting editor review13 sources

A highland Philippine pitcher plant from the mountains of northern Luzon, redefined in 2013 in a narrow sense. Its stems are densely white-hairy and its upper pitchers carry fringed wings just below the rim.

Range
Endemic to the Philippines [1]. In the narrow sense used since 2013 it is confined to the mountains of northern Luzon, while plants from southern Luzon to Mindanao are treated as N. graciliflora [2, 3].
Habitat
Submontane forest above 500 m in the mountains of northern Luzon [2].
Status
Assessed by IUCN for the Red List in 2018; see the assessment for its category [4]. Covered by the CITES Appendix II listing for Nepenthes and by Annex B in the EU; the CITES Species+ database still lists N. graciliflora as a synonym of N. alata, so CITES uses the older, wider concept [5].

Growing conditions at a glance

Guidance published for the cultivation group this species belongs to.

Light
ICPS places Nepenthes in its moderate-light group, about 8,000 to 15,000 lux of white light, and says they grow well under blue/red LEDs [6].
Water
NC State Extension recommends distilled water or rainwater rather than tap water [7]. Indoors, ICPS says a pot can stand in water for a day or two while the Sphagnum soaks it up [8].
Soil
For plants grown in a house, ICPS suggests about 75% long-fibered Sphagnum and 25% perlite in a larger pot, because indoor plants dry out quickly [8].
Humidity
The 1979 CPN beginner column gives 80 to 100% humidity for good pitcher production [9], but ICPS names N. alata among the species that can be grown as house plants [8].
Temperature
A highland species. NC State Extension suggests days of 24 to 29 °C (75 to 85 °F) with nights in the low 60s °F for highland Nepenthes [7]; ICPS says highland species not from fog forest cope with a cool house in winter [8].
Dormancy
No dormancy: Nepenthes are perennial tropical vines, and cool conditions only slow them. In the 1979 CPN trial, plants kept at a 7 °C (45 °F) minimum survived but made only two or three new leaves a season [9].

A name that shrank in 2013

Blanco named Nepenthes alata from the Philippines in 1837 [1]. For most of the time since, the name covered what Cheek and Jebb call the most widespread and common of the endemic Philippine Nepenthes [10]. Working toward a world monograph of the genus, they reviewed that variation in 2013 and split it [3]. In their narrow sense, N. alata is the plant of the northern Luzon mountains. Plants from the forests of southern Luzon through the Visayas to Mindanao became N. graciliflora, a name first published in 1912 and now taken back out of synonymy [2, 10]. The same review produced several new species. N. negros, from Negros and Biliran islands, was named alongside the redefinition [10, 3]. N. ultra, a plant of lowland ultramafic scrub on the Luzon coast, came from two odd specimens among the 40 that had been filed as N. alata in the wide sense [2].

WCVP follows the narrow view and accepts N. graciliflora as a separate species [1]. CITES does not yet: its Species+ database still lists N. graciliflora as a synonym of N. alata [5]. Literature written before the split uses the name in the wide sense [10].

Telling it from its look-alikes

Cheek and Jebb separate the three Luzon members of the group mainly by hairs and by the shape of the upper pitchers [2]:

Character N. alata N. graciliflora N. ultra
Stem tip Covered in dense, long white hairs Hairless apart from tiny glands Hairless or nearly so
Upper pitcher shape Subcylindric, slightly narrowed at the middle, widest in the lower half Swollen base, abruptly narrowed to a slimmer upper part Subcylindric, about equally wide at base and top
Fringed wings on upper pitchers Just below the rim; reduced to ribs elsewhere Only on the lower part None, only ribs
Outer pitcher surface Over 90% covered in grey star-shaped hairs about 0.18 mm across Almost hairless Sparse, minute star-shaped hairs
Range Mountains of northern Luzon, above 500 m Southern Luzon to Mindanao, above 500 m Coastal Luzon, mostly below 40 m

All members of the N. alata group share winged leaf stalks, round stems and a ridge at the base of the lid’s underside that usually bears a small appendage; their upper pitchers are usually broadest at the base [3]. In both N. alata and N. graciliflora, the underside of the lid is densely and evenly covered in tiny round nectar glands 0.15 to 0.2 mm across [3]. NC State Extension describes the cultivated plant as having strap-shaped leaves and green pitchers striped dark red [7].

The species behind the peristome experiment

N. alata is the species in which the slippery peristome was shown to matter even when a waxy zone is present. Its peristome is narrow, with an inner slope only about 1 to 5 mm long, compared with 10 to 20 mm in N. bicalcarata, and its inner wall is waxy [11]. When the peristome was dry, the waxy wall was the main trapping zone. When it was wet, most ants slid straight off the rim into the pitcher, often without touching the wax. On a pitcher with one half of the peristome wetted, 82% of ants visiting the wet side were caught against 24% on the dry side, and wetting raised the overall capture rate more than threefold [11]. The genus page explains the peristome in more detail.

Growing it

ICPS lists N. alata with N. khasiana and N. ventricosa as highland species that do not come from fog forest, and so can handle the cooler temperatures of a house in winter [8]. NC State Extension calls it easy to grow [7]. Indoors, the main adjustment is the potting mix: plants in a house use more water and dry out faster than in a greenhouse, so ICPS suggests a heavier mix of about three parts long-fibered Sphagnum to one part perlite and a larger pot [8]. See growing carnivorous plants indoors and light for carnivorous plants. NC State Extension links poorly developed pitchers to low humidity [7]; the troubleshooting page goes through the other checks.

ICPS also warns that cold drafts from a window in winter can kill Nepenthes growing tips, even behind double-glazed windows [8].

Propagation

Most plants are increased from stem cuttings. ICPS recommends taking them from a healthy, actively growing plant. A growing tip with two or three leaves makes the best cutting, and cuttings are kept sealed in a bag in bright light out of direct sun until new growth appears, which can take a month to a year [12]. Seed needs a male and a female plant flowering at the same time. ICPS notes that the two plants a grower has in flower together are usually of different species, and as far as is known all Nepenthes species interbreed [13].

Related guides

Related plants

Sources

  1. Nepenthes alata Blanco: World Checklist of Vascular Plants record (via GBIF). Royal Botanic Gardens, Kew; dataset published 2026-06-04, CC BY 4.0. Accepted name, authority, synonyms and native range. Accessed October 12, 2026.
  2. Nepenthes ultra (Nepenthaceae), a new species from Luzon, Philippines. Blumea 58(3): 241-244 (2013), Cheek and Jebb. Table of characters separating N. alata, N. graciliflora and N. ultra; range and altitude of each; 40 specimens of N. alata in the wide sense. Accessed October 12, 2026.
  3. Recircumscription of the Nepenthes alata group (Caryophyllales: Nepenthaceae), in the Philippines, with four new species. European Journal of Taxonomy 69: 1-23 (2013), Cheek and Jebb. Characters of the N. alata group, key separating N. alata from N. graciliflora, Philippine habitats. Accessed October 12, 2026.
  4. Nepenthes alata: IUCN Red List of Threatened Species assessment. International Union for Conservation of Nature. Assessment link found through the Red List checklist published on GBIF; Red List categories are not reproduced on this site. Accessed October 12, 2026.
  5. Species+ record: Nepenthes alata (CITES and EU listings). UNEP-WCMC and CITES Secretariat. CITES Appendix II through the genus listing; EU Annex B; synonyms include N. graciliflora. Accessed October 12, 2026.
  6. LED Plant Lighting. International Carnivorous Plant Society. Moderate light for Nepenthes. Accessed October 12, 2026.
  7. Nepenthes (North Carolina Extension Gardener Plant Toolbox). NC State Extension. Common name, description of cultivated N. alata, highland temperatures, water. Accessed October 12, 2026.
  8. Window Sill Garden. International Carnivorous Plant Society. N. alata among highland species suggested for a house; potting mix and watering indoors. Accessed October 12, 2026.
  9. Beginner's Corner: Nepenthes. Carnivorous Plant Newsletter 8(1): 24-29, 39 (1979), by Joe Mazrimas. Humidity for pitcher production; slow growth at cool temperatures. Accessed October 12, 2026.
  10. Typification and redelimitation of Nepenthes alata with notes on the N. alata group, and N. negros sp. nov. from the Philippines. Nordic Journal of Botany 31(5): 616-622 (2013), Cheek and Jebb. N. alata had been regarded as the most widespread and common endemic Philippine species; redelimited in a narrower sense and N. graciliflora resurrected (abstract). Accessed October 12, 2026.
  11. Insect aquaplaning: Nepenthes pitcher plants capture prey with the peristome, a fully wettable water-lubricated anisotropic surface. Proceedings of the National Academy of Sciences 101(39): 14138-14143 (2004), Bohn and Federle. Peristome width and waxy zone of N. alata; capture rates with wet and dry peristome. Accessed October 12, 2026.
  12. Nepenthes Propagation via stem cuttings. International Carnivorous Plant Society. Cuttings from climbing stems, rooting media, time to root. Accessed October 12, 2026.
  13. Growing Nepenthes from Seed. International Carnivorous Plant Society. Separate male and female plants; all species interbreed. Accessed October 12, 2026.