Delonix regia is a species of flowering plant from the Fabaceae

Fabaceae

The Fabaceae or Leguminosae, commonly known as the legume, pea, or bean family, is a large and economically important family of flowering plants. The group is the third largest land plant family, behind only the Orchidaceae and Asteraceae, with 730 genera and over 19,400 species...

 family, Caesalpinioideae

Caesalpinioideae

Caesalpinioideae is a botanical name at the rank of subfamily, placed in the large family Fabaceae or Leguminosae. Its name is formed from the generic name Caesalpinia....

 subfamilia, noted for its fern-like leaves and flamboyant display of flowers. In many tropical parts of countries around the world it is grown as an ornamental tree and in English it is given the name Royal Poinciana or Flamboyant. It is also one of several trees known as Flame tree

Flame tree

Flame tree is a common name used in various parts of the world to refer to several different species of tree:* Delonix regia - Royal Poinciana* Brachychiton acerifolius - Illawarra flame tree* Koelreuteria bipinnata - Chinese flame tree...

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In India it is known as Gulmohar (Hindi and Urdu -‘Gul’ means ‘Flower’ and ‘Mohr’ is 'Peacock', thus the name suggests a spectacular show of color, like the extraordinary colors of a peacock's tail).