I am not familiar with Gulmohar, however, anthers are part of the stamen, the male reproductive part of a flower. They are attached to stalks and are generally upright. This is an adaptation so that insects can brush past and pollen grains, the male gametes, can stick to the insects. Also, wind can transport pollen on a breeze. Therefore, if you break anthers open over a piece of black paper, the powdery substance you will see will be pollen. Under the microscope, the pollen grains will have a shape unique to that species. Remember, as it is the male gametophyte, it is haploid, not diploid.