Rafflesia



The Rafflesia is one of the world’s largest flowers and belongs to the family Rafflesiaceae. The plant family Rafflesiaceae has eight genera that include the genus Rafflesia. Rafflesia arnoldi, which can grow up to 150 cm in diameter, is the largest flower in the world.1 It was discovered by Sir Stamford Raffles and Dr Joseph Arnold on 19 May 1818.2

Origin and distribution
Raffles and Arnold were touring the west coast of Sumatra in Borneo around the Manna River when their guide came to them with news of having seen a huge flower. The gigantic flower was named Rafflesia arnoldi by Raffles to commemorate his friendship with Arnold. However, Rafflesia sightings had been reported much earlier. Louis Auguste Deschamp, a French surgeon-naturalist, reported having seen the Rafflesia in 1797 in Java. Prior to both discoveries, the aborigines who had known about its presence were using Rafflesia for medicinal purposes. Since 1821, 24 Rafflesia species names have been published though not all of them are taxonomically resolved and identified.3


Rafflesia is found in the tropical rainforests of Borneo, Sumatra, Java, Peninsular Malaysia, Thailand and the Philippines. It occurs only in certain habitats as a parasite on the Tetrastigma species of woody vines.4 Rafflesia is a very rare flower, difficult to reproduce in laboratories and its dried specimen is difficult to preserve. Rafflesia can measure between 36 to 42 inches in diameter and weigh between 9 to 12 kg.5

Description
Taxonomic classification of the plant family Rafflesiaceae has not yet been thoroughly decided. At least 55 species in eight genera however have been identified. The genera of the Rafflesiaceae plant family are Apodanthes, Bdallophyton, Cytinus, Mitrastemon, Pilostyles, Rafflesia, Rhizanthes and Sapria. Since all the plants of this family are parasitic, they do not have any roots, stems or leaves and lack chlorophyll. Individual flowers or buds simply sprout on the species of Tetrastigma woody vines. Some flowers are monoecius, with both sexes in the same flower. All flowers of the family Rafflesiaceae may not carry the same parts and traits.6

Usage and potential
Food: In Thailand, young buds of the flower are eaten as a delicacy.

Medicine: In peninsular Malaysia, Rafflesia buds are used by women to stop internal bleeding and shrink the womb after childbirth. Men use it as an energy drink or an aphrodisiac. Thai monks use the buds to make different concoctions for different purposes. In spite of its various uses, the chemical composition of Rafflesia flowers has not been extensively analysed yet. However, preliminary phytochemical screening has showed no evidence of the flowers’ medicinal properties. On the contrary, the buds and flowers have a high content of tannin and phenols that can be toxic when taken in large quantities.

Other uses: In Sabah, Malaysia, it was considered a flower of spirits or a taboo flower because of its foul smell and gigantic size. In Thailand, the flowers are believed to have mystical powers, able to help one attain nirvana. 7

Variant names
Common name: Rafflesia.
Scientific name: Rafflesia arnoldi.
Malay name: Bunga patma, Yak-yak, Patma raksasa, Patma kemubut, Krubut, Pakma (Sarawak), Kukuanga (Sabah), Wusak-tombuakar (Tambunan), Ambun ambun, Kemubut (Sumatra).
Other common names: Devil’s betel box, sun toadstool, stinking corpse lily.8

Species of Rafflesia
The recognised species of Rafflesia with their scientific name, year and place of discovery are listed as follows:

1821: Rafflesia arnoldi, Sumatra, Borneo.
1825: Rafflesia patma, Sumatra, Java.
1841: Rafflesia manillana, Leyte Island, Phillipines.
1850: Rafflesia rochussenii, Sumatra, Java.
1868: Rafflesia tuan-mudae, Borneo.
1879: Rafflesia hasseltii, Sumatra.
1884: Rafflesia schadenbergiana, Mindanao, Philippines
1910: Rafflesia cantleyi, Peninsular Malaysia
1918: Rafflesia borneensis, Borneo.
1918: Rafflesia ciliata, Borneo.
1918: Rafflesia witkampii, Borneo.
1984: Rafflesia gadutensis, Sumatra.
1984: Rafflesia keithii, Borneo.
1984: Rafflesia kerrii, Thailand and Peninsular Malaysia.
1984: Rafflesia micropylora, Sumatra.
1984: Rafflesia pricei, Borneo.
1989: Rafflesia tengku-adlinii, Borneo.9



Author

Naidu Ratnala Thulaja



References
1. Jamili Nais. (2001). Rafflesia of the world. Malaysia: Sabah Parks, p. 14. (Call no.: RSEA q583.2095953 JAM)
2. Jamili Nais. (2001). Rafflesia of the world. Malaysia: Sabah Parks, p. 27. (Call no.: RSEA q583.2095953 JAM)
3. Jamili Nais. (2001). Rafflesia of the world. Malaysia: Sabah Parks, pp. 23‒27. (Call no.: RSEA q583.2095953 JAM)
4. Kamarudin Mat Salleh. (1991). Rafflesia: Magnificent flower of Sabah. Kota Kinabalu: Borneo Pub. Co., p. 7. (Call no.: RSEA 581.5249 KAM)
5. Jamili Nais. (2001). Rafflesia of the world. Malaysia: Sabah Parks, p. 14. (Call no.: RSEA q583.2095953 JAM)
6. Jamili Nais. (2001). Rafflesia of the world. Malaysia: Sabah Parks, p. 1. (Call no.: RSEA q583.2095953 JAM)

7. Jamili Nais. (2001). Rafflesia of the world. Malaysia: Sabah Parks, p. 30. (Call no.: RSEA q583.2095953 JAM)
8. Jamili Nais. (2001). Rafflesia of the world. Malaysia: Sabah Parks, p. 31. (Call no.: RSEA q583.2095953 JAM)
9. Jamili Nais. (2001). Rafflesia of the world. Malaysia: Sabah Parks, pp. 27‒28. (Call no.: RSEA q583.2095953 JAM)




The information in this article is valid as at 2006 and correct as far as we can ascertain from our sources. It is not intended to be an exhaustive or complete history of the subject. Please contact the Library for further reading materials on the topic.

 

Subject
Science and technology>>Agriculture>>Horticulture>>Flowers and ornamental plants
Plants
Rafflesia--Singapore
Nature>>Plants