Slender Pitcher Plant

Nepenthes gracilis, the slender pitcher plant, is a common and weedy lowland species found across the Sunda region, from Thailand and Cambodia to Borneo and Sulawesi. Its small, narrow pitchers use raindrops to knock insects off the underside of the lid.

Nepenthes gracilis is a slender climber, usually about 2 m tall and occasionally up to 5 m, with triangular stems and leaf bases that run down the stem ridges. Its small, elongated pitchers look unremarkable, with a very thin peristome. Upper pitchers are about 7 to 14.5 cm (3 to 6 in) long, sub-cylindrical and slightly narrowed in the middle.

It is often confused with N. albomarginata, which has a band of white hairs below the peristome, and with N. reinwardtiana, which has eye-spots inside the pitcher and an untoothed peristome. The species varies little across its range, and most of the varieties once named are no longer recognised.

Despite its abundance, natural hybrids are fairly rare. Those recorded include N. × trichocarpa (with N. ampullaria) and N. × cantleyi (with N. bicalcarata). Genetic studies place it as the sister group to a 'N. mirabilis group' that includes N. bicalcarata, N. ampullaria, N. mirabilis and N. rafflesiana.

آبائی علاقہ: Borneo, Sumatra, Peninsular Malaysia, Singapore, central Sulawesi, southern Thailand and Cambodia

موسمیاتی زونز: Tropical lowland, mostly below 100 m

Nepenthes gracilis grows in lowland peat swamp forest, kerangas (heath) forest, heath scrub on podzol soils, swamp edges and disturbed places such as roadsides, on poor soils and sometimes on sandstone or ultramafic rock. It has been recorded from sea level to about 1,100 m, but most populations are below 100 m and plants are rare above 1,000 m.

بالغ سائز: Climbs to about 2 m (up to 5 m); upper pitchers 7-14.5 cm (3-6 in)

شرح نمو: Moderate

ٹریپ کی قسم: Pitfall Trap

The underside of the lid of N. gracilis carries an uneven layer of wax crystals, a feature that may be unique in the genus. It is thinner than, and different in structure from, the waxy zone inside the pitcher, and in dry weather insects can walk on it easily. During rain, however, the impact of raindrops on the lid shakes insects off their footing and drops them into the pitcher below. In this way the lid works as a rain-powered part of the trap.

Gracilis is Latin for slender.
Its lid acts as a springboard in rain: raindrops knock insects into the pitcher.
It is one of the most widespread Nepenthes, also found on many small islands such as Penang, Phuket and Langkawi.
The Philippine species N. abgracilis is named for its superficial similarity to it.
Barry Rice calls it quite forgiving of cultivation errors and an excellent choice for terrarium growers.
The IUCN Red List assessed it as Least Concern in 2018 (Clarke, assessment T39663A143960417).

Pieter Willem Korthals described Nepenthes gracilis in his 1839 monograph Over het geslacht Nepenthes, from a specimen collected in Borneo on Gunung Pamatton at 325 m. Lindley's N. laevis of 1848 is a synonym. Several varieties were named in the 19th and 20th centuries, among them var. elongata, var. teysmanniana and var. arenaria, but most are no longer considered valid. In 2001 Charles Clarke's analysis of morphology placed it beside N. reinwardtiana, but genetic data later showed it is not closely related to that species.

1. Nepenthes gracilis, Wikipedia
2. Nepenthes gracilis, Caryophyllales Network: Nepenthaceae (after Cheek & Jebb 2001, Flora Malesiana I, 15)
3. Nepenthes: species of Borneo, 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)