Rafflesia arnoldii is a member of the genus Rafflesia

Rafflesia

Rafflesia is a genus of parasitic flowering plants. It contains approximately 28 species , all found in southeastern Asia, on the Malay Peninsula, Borneo, Sumatra, Thailand and the Philippines.Rafflesia was found in the Indonesian rain forest by an Indonesian guide working for Dr...

. It is noted for producing the largest individual flower on earth, and a strong odor of decaying flesh - the latter point earning it the nickname of "corpse flower". It is an endemic plant that occurs only in the rainforest

Rainforest

Rainforests are forests characterized by high rainfall, with definitions based on a minimum normal annual rainfall of 1750-2000 mm...

 of Bengkulu

Bengkulu

Bengkulu is a province of Indonesia. It is on the southwest coast of the island of Sumatra, and borders the provinces of West Sumatra, Jambi, South Sumatra and Lampung. The capital and largest city is Bengkulu city. It was formerly the site of a British garrison, which they called Bencoolen...

 and 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...

 Island 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...

. Although there are some plants with larger flowering organs like the Titan Arum

Titan arum

The titan arum or Amorphophallus titanum is a flowering plant with the largest unbranched inflorescence in the world...

 and Talipot palm

Talipot palm

Corypha umbraculifera is a species of palm, native to southern India and Sri Lanka.It is one of the largest palms in the world; individual specimens have reached heights of up to 25 m, with stems up to 1.3 m in diameter...

, those are technically clusters of many flowers.

Rafflesia arnoldii is one of the three national flowers in 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...

, the other two being the white jasmine

Jasminum sambac

Jasminum sambac is a species of jasmine native to South and Southeast Asia. It is a small shrub or vine growing up to in height. It is widely cultivated for its attractive and sweetly fragrant flowers. The flowers are also used for perfumes and for making tea. It is known as the Arabian jasmine in...

 and moon orchid

Phalaenopsis amabilis

Phalaenopsis amabilis, commonly known as the Moon Orchid, is a species of orchid.- Taxonomy and nomenclature :It was first discovered on a small island off the east coast of New Guinea by native botanist Georgius Everhardus Rumphius in 1653; however, he named it Angraecum ablum majus...

.