I googled "spleenwort" and found a plethora of ferns listed, but none seemed to fit. I'll try your approach now.
Edit: I initially found literally dozens of "Asplenium . . . . . ", and concentrated on the second words in the titles. Now; of course, asplenium is the one and = Emu Plains.
P.S. I wouldn't have thought that too many NSW trains stop there.