Artillery Plant or Gunpowder Plant

Description:

This pretty fern-like plant was growing on the walls of a rain water drain in a government office.

Habitat:

This pretty fern-like plant was growing on the walls of a rain water drain in a government office. As I walked around I spotted others growing where the vertical drains from the rooftop terrace meets this rainwater drain.

Notes:

Shade and water-loving.It would make a lovely potted plant. All thanks to RahulUpadhyay for the ID.