Corpse flower

Description

Rafflesia arnoldii, the corpse flower or giant padma, is a species of flowering plant in the parasitic genus Rafflesia. It is noted for producing the largest individual flower on Earth. It has a strong and unpleasant odor of decaying flesh. It is native to the rainforests of Sumatra and Borneo. Although there are some plants with larger flowering organs like the titan arum (Amorphophallus titanum) and talipot palm (Corypha umbraculifera), those are technically clusters of many flowers. Rafflesia arnoldii is one of the three national flowers in Indonesia, the other two being the white jasmine (Jasminum sambac) and moon orchid (Phalaenopsis amabilis). It was officially recognized as a national "rare flower" (Indonesian: puspa langka) in Presidential Decree No. 4 in 1993. Although Rafflesia is a vascular plant, it lacks any observable leaves, stems or even roots, and does not have chlorophyll. It lives as a holoparasite on vines of the genus Tetrastigma. Similar to fungi, individuals grow as a mass of thread-like strands of tissue completely embedded within and in intimate contact with surrounding host cells from which nutrients and water are obtained. It can only be seen outside the host plant when it is ready to reproduce; the only part of Rafflesia that is identifiable as distinctly plant-like are the flowers, though even these are unusual since they attain massive proportions, have a reddish-brown colouration, and stink of rotting flesh. The flower of Rafflesia arnoldii grows to a diameter of around one meter (3.3 feet), weighing up to 11 kilograms (24 lb). These flowers emerge from very large, cabbage-like, maroon or dark brown buds typically about 30 cm (12 in) wide, but the largest (and the largest flower bud ever recorded) found at Mount Sago, Sumatra in May 1956 was 43 cm (17 in) in diameter. Indonesian researchers often refer to the bud as a 'knop' (knob). Rafflesia arnoldii is found in both secondary and primary rainforests. The only host plant species of R. arnoldii is Tetrastigma leucostaphylum in West Sumatra. Tetrastigma are themselves parasites of a sort, using the strength and upright growth of other surrounding plants to reach the light. The host plants of the host plants - the trees that Tetrastigma uses to climb up to light, are relatively limited in number of species, although they are generally the closest tree to the vine.