Nepenthes × hookeriana (icon; after Joseph Dalton Hooker

Joseph Dalton Hooker

Sir Joseph Dalton Hooker OM, GCSI, CB, MD, FRS was one of the greatest British botanists and explorers of the 19th century. Hooker was a founder of geographical botany, and Charles Darwin's closest friend...

), or Hooker's Pitcher-Plant, is a common natural hybrid involving N. rafflesiana

Nepenthes rafflesiana

Nepenthes rafflesiana , or Raffles' Pitcher-Plant, is a species of pitcher plant. It has a very wide distribution covering Borneo, Sumatra, Peninsular Malaysia, and Singapore. Nepenthes rafflesiana is extremely variable with numerous forms and varieties described. In Borneo alone, there are at...

and N. ampullaria

Nepenthes ampullaria

Nepenthes ampullaria , the Flask-Shaped Pitcher-Plant, is a very distinctive and widespread species of Nepenthes, present in Borneo, Sumatra, Thailand, Peninsular Malaysia, Singapore, the Maluku Islands, and New Guinea...

. It was originally described as a species.

It is a relatively common natural hybrid found in lowland conditions throughout Peninsular Malaysia

Peninsular Malaysia

Peninsular Malaysia , also known as West Malaysia , is the part of Malaysia which lies on the Malay Peninsula. Its area is . It shares a land border with Thailand in the north. To the south is the island of Singapore. Across the Strait of Malacca to the west lies the island of Sumatra...

, Borneo

Borneo

Borneo is the third largest island in the world and is located north of Java Island, Indonesia, at the geographic centre of Maritime Southeast Asia....

, Singapore

Singapore

Singapore , officially the Republic of Singapore, is a Southeast Asian city-state off the southern tip of the Malay Peninsula, north of the equator. An island country made up of 63 islands, it is separated from Malaysia by the Straits of Johor to its north and from Indonesia's Riau Islands by the...

 and the Indonesia

Indonesia

Indonesia , officially the Republic of Indonesia , is a country in Southeast Asia and Oceania. Indonesia is an archipelago comprising approximately 13,000 islands. It has 33 provinces with over 238 million people, and is the world's fourth most populous country. Indonesia is a republic, with an...

n island of Sumatra

Sumatra

Sumatra is an island in western Indonesia, westernmost of the Sunda Islands. It is the largest island entirely in Indonesia , and the sixth largest island in the world at 473,481 km2 with a population of 50,365,538...

. Like its parental species, the hybrid is generally found in recently disturbed clearings.

Infraspecific taxa

• Nepenthes hookeri var. elongata Hort.Veitch ex Wilson (1877) sphalm.typogr.
• Nepenthes hookeriana f. elongata (Hort.Veitch ex Wilson) Divers (1879)

Further reading

• Adam, J.H., C.C. Wilcock & M.D. Swaine 1992. Journal of Tropical Forest Science 5(1): 13–25.
• Adam, J.H. 1997. Pertanika Journal of Tropical Agricultural Science 20(2–3): 121–134.
• Adam, J.H. & C.C. Wilcock 1999. Pertanika Journal of Tropical Agricultural Science 22(1): 1–7.
• Clarke, C.M. 1997. Nepenthes of Borneo
  Nepenthes of Borneo
  Nepenthes of Borneo is a monograph by Charles Clarke on the tropical pitcher plants of Borneo. It was first published in 1997 by Natural History Publications , and reprinted in 2006. Clarke describes it as "primarily an ecological monograph"...
  
  . Natural History Publications (Borneo), Kota Kinabalu.
• Clarke, C.M. 2002. A Guide to the Pitcher Plants of Peninsular Malaysia. Natural History Publications (Borneo), Kota Kinabalu.
• Clarke, C.M. 2006. Introduction. In: Danser, B.H. The Nepenthaceae of the Netherlands Indies
  The Nepenthaceae of the Netherlands Indies
  "The Nepenthaceae of the Netherlands Indies" is a seminal monograph by B. H. Danser on the tropical pitcher plants of the Dutch East Indies, North Borneo, the Malay Peninsula, and eastern New Guinea...
  
  . Natural History Publications (Borneo), Kota Kinabalu. pp. 1–15. Handayani, T. 1999. [Conservation of Nepenthes in Indonesian botanic gardens.] In: A. Mardiastuti, I. Sudirman, K.G. Wiryawan, L.I. Sudirman, M.P. Tampubolon, R. Megia & Y. Lestari (eds.) Prosiding II: Seminar Hasil-Hasil Penelitian Bidang Ilmu Hayat. Pusat Antar Universitas Ilmu Hayat IPB, Bogor. pp. 365–372.
• Handayani, T., D. Latifah & Dodo 2005. Biodiversitas 6(4): 251–255. Mansur, M. 2001. In: Prosiding Seminar Hari Cinta Puspa dan Satwa Nasional. Lembaga Ilmu Pengetahuan Indonesia, Bogor. pp. 244–253. Rahim, S.A., T. Lihan, M. Baba, A. Laming, Z.A. Rahman, W.M.R. Idris, M.B. Gasim, A. Hashim, S.M. Yusof & L.H. Yin 2008. Pengambilan logam berat oleh Nepenthes gracilis dan N. Hookeriana dalam tanih bekas lombong besi dan timah, Pelepah Kanan, Kota Tinggi, Johor. [Heavy metal uptake by Nepenthes gracilis and N. Hookeriana in ex-iron and tin mine soil, Pelepah Kanan, Kota Tinggi, Johor.] Sains Malaysiana 37(1): 39–49. Abstract
• Shivas, R.G. 1984. Pitcher Plants of Peninsular Malaysia & Singapore. Maruzen Asia, Kuala Lumpur.
• Teo, L.L. 2001. Study of natural hybridisation in some tropical plants using amplified fragment length polymorphism analysis. M.Sc. thesis, Nanyang Technological University, Singapore.
• Turnbull, J. & A. Middleton 1984. Carnivorous Plant Newsletter
  Carnivorous Plant Newsletter
  The Carnivorous Plant Newsletter is the official publication of the International Carnivorous Plant Society , the largest such organization in the world.-History and editorship:...
  
  13(3): 61–67.