Tropical Pitcher Plant (Monkey Cup)

Nepenthes ventricosa is a tropical pitcher plant endemic to the Philippines, where it grows in the highlands at 1,000-2,000 m. It produces numerous waxy, waisted pitchers up to about 8 inches (20 cm) tall in colors from ivory white to red.

Nepenthes ventricosa is a highland species of tropical pitcher plant. Like other Nepenthes it grows as a climbing or scrambling plant: an extension of each leaf's midrib forms a tendril, and the pitcher develops at the tendril's tip. Lower pitchers form on young plants, while mature, climbing plants produce upper (aerial) pitchers that often differ in shape and color.

The pitchers of N. ventricosa are numerous, glossy and waxy, with a narrowed 'waist' in the middle, and range from ivory white through green and speckled forms to red. The species name comes from Neo-Latin ventricosus, "having a swelling on one side". It is very closely related to N. burkei and N. sibuyanensis, but differs from them in its more waisted pitchers, smaller mouth and, generally, thinner peristome. Many plants labeled N. burkei in collections are reported to be N. ventricosa.

Nepenthes plants are either male or female, so seed can only be produced when plants of both sexes flower at the same time. Like all Nepenthes, the species hybridizes readily; in the wild it crosses with N. alata to form the natural hybrid N. × ventrata.

Mahalliy hudud: Philippines (endemic); recorded from Luzon, Panay and Sibuyan

Iqlim zonalari: Tropical highland (1,000-2,000 m); grown under glass outside the tropics

A highland species of the Philippines, growing at elevations of about 1,000-2,000 m (3,300-6,600 ft). It has been recorded on the islands of Luzon, Panay and Sibuyan; one photographed habitat is on Mayon Volcano in Luzon.

Yetuk o'lcham: Pitchers up to 8 in (20 cm) tall; stems climb and lengthen with age

O'sish sur'ati: Moderate

Tuzoq turi: Pitfall Trap

Each pitcher is a modified leaf tip that holds digestive fluid. Insects, chiefly ants and other arthropods, are attracted by color, nectar and scent. The ridged rim around the mouth, the peristome, is slippery, especially when wet, and insects that step onto it can 'aquaplane' and fall in. A waxy coating on the upper inner wall makes climbing out nearly impossible. Glands in the lower part of the pitcher secrete digestive enzymes and absorb the released nutrients. A lid (operculum) above the mouth helps keep rain from diluting the fluid. The fluid also contains antimicrobial compounds that limit the growth of bacteria and fungi.

The name ventricosa means 'having a swelling on one side', describing the pitcher's bulging shape.
It forms a natural hybrid with N. alata, named N. × ventrata.
Pitcher color ranges from almost ghostly white or cream to green, speckled and red.
Nepenthes plants are either male or female.
Larvae of the Asian tiger mosquito have been recorded living in pitchers of N. ventricosa grown in Virginia (Duffield and Sheridan, 2007).
The IUCN Red List assessed the species as Least Concern in 2018 (Clarke, assessment T39710A143966192).

Nepenthes ventricosa was described by Francisco Manuel Blanco in 1837, in his Flora de Filipinas. Botanical knowledge of the genus had begun much earlier: in 1790 the Portuguese priest João de Loureiro described a pitcher plant from Vietnam as Phyllamphora mirabilis, mistakenly stating that its lid opened and closed on its own. Today about 170 Nepenthes species are recognized, with new ones described almost every year.

1. Nepenthes ventricosa, Wikipedia
2. Nepenthes, Wikipedia
3. Nepenthes: species of the Philippines, The Carnivorous Plant FAQ (Barry Rice)
4. Nepenthes: basic cultivation, The Carnivorous Plant FAQ (Barry Rice)
5. Nepenthes: advanced cultivation, The Carnivorous Plant FAQ (Barry Rice)
6. Thumbnail guidelines on growing a tropical pitcher plant, The Carnivorous Plant FAQ (Barry Rice)