Planted an aerial root, and it's growing.

[Orchidreamer]

Any chance any sunflower seeds or bird seeds fell into the pot? Those are not orchid seedlings, but you can grow them on to see what they are!

There are two phal species, Phal schilleriana and Phal stuartiana, that grow keikis (baby orchids) from the roots. However, the root needs to be attached to the plant so the keiki gets the nutrients to grow.