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Raffles'
pitcher plant
Nepenthes rafflesiana
Family Nepenthaceae
updated
Dec 10
Where seen? In Singapore, it is usually found in adinandra
belukar, forest edges or on seaward sides of our natural cliffs
on many of our offshore islands. This plant has the largest pitchers
in Singapore.
Features: A climber that grows
to 10m long or more, clambering over trees and other plants with tendrils.
Pitchers are vase-shaped or narrowly funnel-shaped (20-35cm long),
green at the base and purplish-red at the mouth with two prominent
ribs. It may have ground pitchers which are urn- or goblet-shaped
(rounder) (5-25cm long) with two fringed wings. Male and female flowers
are borne on separate plants, in tall bunches (inflorescence). The
fruits are capsules that contain thread-like seeds which disperse
in the wind.
Pit of Death: The pitchers are
modified leaves, each with a tiny lid. Nectar is secreted by glands
under the lid or at the lip of the pitcher, which are colourful too.
These attract insects. The pitcher's lip is smooth and inner surface
covered with loose scales of wax that clog up the feet of insects.
Thus a small misstep causes the hapless insect to slide into the fluid
in the pitcher, where it eventually drowns. The resulting nutrients
in the fluid are absorbed by the plant.
Human uses: According to Burkill, the tough stems of pitcher
plants (species not specified) are used in rope making, while the
roots are used to treat stomach aches, dysentery and in poultices.
The stem may be used to treat coughs and fevers.
Status and threats: The plant
is listed as 'Vulnerable' in the Red List of threatened plants of
Singapore.
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Sentosa, Jun
09
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Sentosa, Aug
09
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Sentosa, Jun
09
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Sentosa, Jun
09
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Sentosa, Jun
09
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St. John's
Island, Aug 09
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St. John's
Island, Aug 09
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Pulau Tekukor,
Oct 10
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Pulau Tekukor,
Oct 10
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Pulau Tekukor,
Oct 10
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Sentosa, Dec 10
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Sentosa, Dec 10
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Sentosa, Dec 10
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References
- Tan, Hugh
T.W. 1997. A Guide to the Carnivorous Plants of SIngapore.
BP Science Centre Guidebook. 176 pp.
- Tan, Hugh
T.W. and T. Morgany. 2001. Growing
the Native Plants of Singapore. BP Science Centre Guidebook.
168pp.
- Hsuan Keng,
S.C. Chin and H. T. W. Tan.1998, The
Concise Flora of Singapore II: Monoctyledons
Singapore University Press. 215 pp.
- Davison,
G.W. H. and P. K. L. Ng and Ho Hua Chew, 2008. The Singapore
Red Data Book: Threatened plants and animals of Singapore.
Nature Society (Singapore). 285 pp.
- Burkill,
I. H., 1993. A
Dictionary of the Economic Products of the Malay Peninsula
.
3rd printing. Publication Unit, Ministry of Agriculture, Malaysia,
Kuala Lumpur. Volume 1: 1-1240; volume 2: 1241-2444.
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