Rafflesia Park where the flowers are numbered and monitored by the park rangers. "Rafflesia" are also remarkable for showing a large horizontal transfer of genes from their host plants. This is well known among bacteria, but not higher organisms. The name "corpse flower" applied to "Rafflesia" can be confusing because this common name also refers to the titan arum ("Amorphophallus titanum") of the family Araceae. Moreover, because "Amorphophallus" has the world's largest unbranched inflorescence, it is sometimes mistakenly credited as having the world's largest flower. Both "Rafflesia" and "Amorphophallus" are flowering plants, but they are only distantly related. "Rafflesia arnoldii" has
Bukit Barisan Selatan National Park section is a peninsula. It is covered by montane forest, lowland tropical forest, coastal forest and mangrove forest. Plants in the park include Nipa palm, "Casuarina equisetifolia", "Anisoptera curtisii" and "Gonystylus bancanus", as well as Sonneratia, Pandanus, Shorea and Dipterocarpus species. Large flowers in the park include the "Rafflesia arnoldii", "Amorphophallus decus-silvae", "Amorphophallus titanum" and the world's largest orchid the "Grammatophyllum speciosum". The park is home to many endangered and threatened species, including: Other animals in the park are the Malayan tapir, siamang, Sumatran surili, sun bear and lesser mouse-deer. There are over 300 species of bird in the park,