The ICPS partially funded the establishment of The Rare Nepenthes Collection, which aims to conserve four of the rarest Nepenthes species: N. aristolochioides, N. clipeata, N. khasiana, and N. rigidifolia.
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With only an estimated 15 plants remaining in the wild as of 1995, Nepenthes clipeata is the most endangered of all known tropical pitcher plants.
In 1894, Hallier became the second European to climb Mount Kelam (after a certain Dr. Gürtler) and the first to collect specimens of the pitcher plant Nepenthes clipeata.
Nepenthes clipeata was first collected in 1894 by Johannes Gottfried Hallier, who summited Mount Kelam 5 times between 30 January and 13 February.
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There is now thought to be little hope for the long-term survival of this species in the wild and the Nepenthes clipeata Survival Project (NcSP) has been set up by the International Carnivorous Plant Society (ICPS) to facilitate ex situ conservation of the species.
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During the 1980s, plant collectors began to visit Mount Kelam with increased frequency, placing pressure on wild populations of N. clipeata.
Nepenthes clipeata | Nepenthes bokorensis | Nepenthes | Nepenthes rajah | Nepenthes mantalingajanensis | Nepenthes klossii | Nepenthes faizaliana | Nepenthes epiphytica | Nepenthes abgracilis | Nepenthes rigidifolia | Nepenthes mira | Nepenthes khasiana | Nepenthes kerrii | Nepenthes deaniana | Nepenthes cid | Nepenthes aristolochioides | Nepenthes viridis | Nepenthes ovata | Nepenthes mirabilis | Nepenthes spathulata | Nepenthes rhombicaulis | Nepenthes pitopangii | Nepenthes × kinabaluensis | Nepenthes holdenii | Nepenthes × harryana | Nepenthes dubia | Nepenthes burbidgeae | Nepenthes bellii | A skeletal revision of ''Nepenthes'' (Nepenthaceae) | ''Nepenthes smilesii'' from Kirirom National Park |