Banyan facts for kids

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Banyan
Ficus benghalensis
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta
Class: Magnoliopsida
Order: Urticales
Family: Moraceae
Genus: Ficus
Subgenus: (Urostigma)
Rubber, or Banyan Tree, on Banana River, Florida
Banyan Tree on Banana River, Florida. The tree is a Florida strangler fig (Ficus aurea).
The head of Buddha in Wat Mahathat
This is the famous Wat Mahathat Temple, with banyan roots wrapped around a buddha head.
Palermo-Park-bjs-1
Strangler fig in Palermo, Italy

A banyan (or 'banian') is a kind of fig. It usually starts life by growing on another plant as an epiphyte. Its seeds germinate in the cracks and crevices on a host tree, or on other structures like buildings and bridges.

"Banyan" usually means the Indian banyan or Ficus benghalensis. It is the National tree of the Republic of India. However, the term actually includes all figs which share their epiphytic life cycle. They are put in the subgenus Urostigma. The seeds of banyans are dispersed by fruit-eating birds. The seeds germinate and send down roots towards the ground. These roots may envelop (cover) part of the host tree or building structure, from which they get the casual name of strangler fig.

A number of tropical forest species grow by strangling. There are other examples in the genus Ficus that competes for light. Any Ficus species showing this habit may be termed a strangler fig.

The leaves of the banyan tree are large, leathery, glossy green and elliptical in shape. Like most of the fig-trees, the leaf bud is covered by two large scales. As the leaf develops the scales fall. Young leaves have an attractive reddish tinge.

Older banyan trees have aerial prop roots that grow into thick woody trunks which, with age, can become indistinguishable from the main trunk. Old trees can spread out laterally using these prop roots to cover a wide area.

Like other Fig species (including the common edible fig Ficus carica), banyans have unique fruit structures and are dependent on fig wasps for reproduction.

The fatal embrace

Once the roots get to the ground, they suck up nutrients and grow faster and thicker. They cover the trunk of the host tree, and their leaves and branches in the canopy block the light from the host. Lacking enough nutrition and light, the host tree eventually dies. Its wood is destroyed by beetles, termites and fungi. Only the hollow space inside the banyan remains. The banyan roots make a huge cylinder, and it stands up perfectly well.

Often the banyan tree is formed from several different fruits which germinated on the same host tree. This has been proved by genome analysis.

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