The Golden Shower Tree or Indian laburnum.
In the family Fabaceae. Fabaceae is the botanical name of a large and economically important family of flowering plants, which is commonly known as the legume family, pea family, bean family or pulse family.
Native to southern Asia, from southern Pakistan east through India to Myanmar and south to Sri Lanka.
The fruit is a legume, with a pungent odour and containing several seeds. The seeds are poisonous.
It is widely grown as an ornamental plant in tropical and subtropical areas.
It blooms in the month of May; flowering is profuse, with trees being covered with yellow flora, with almost no leaf being seen.
It is known in Spanish speaking countries as caña fistula.

The golden shower tree is the national flower of Thailand and is called Dok Khuen; its yellow leaves symbolize Thai royalty.
It is the state flower of Kerala in India. The flowers are of ritual importance in the Vishnu festival.
The golden shower tree is known as 'Amaltas' in Hindi and Urdu. A 20 rupees stamp exists with its picture on it in India.

Wikipedia

This photograph was taken of my next door neighbor's tree.