palas

palas A tree of eastern India and Burma, Butea monosperma.
2005, Bhojraj Dwivedi, Environmental Vaastu, p. 162:

The Dhak or Palas is a familiar wild tree and is common throughout the greater part of India except in drier parts.

The tea garden lay in the foothills of Bhutan and got its name from the many palash trees that stood tall among the undulating green sea of tea bushes.