Answer : 2. "Palash"
Explanation :

1. In Rajasthan, the Palash tree is called the ‘flame of the forest’. Palash is also known as Tesu.

2. It is a medium-sized tree whose height is about 6-12 meters.

3. Butea monosperm is the scientific name.

4. Palash flowers are bright red or yellow in colour and

5. Bloom in the months of January to March. Due to the abundance of Palash flowers, this tree is called the 'Flame of the Forest'