Self sown.

This time of the year my Slipper Orchid blooms with quite a number of flowers. However, a Maiden Hair Fern has established itself in the same pot.
What is most interesting is the fact that it has sprouted from the drain holes situated in the bottom of the pot and appears to be taking over completely.

I hope my Orchid survives as I've had it for over fifteen years in the same pot.