Hi, Allan,
If you're still around, perhaps I can shed a little light on your photo, and the two ferns shown.
The rear fern is a Drynaria Rigidula....a fairly common fern in eastern Australia, but rare in USA....selling for up to $200 there for a small species.
The front fern is indeed a Drynaria Rigidula Cultivar 'Whitei', a variety of the rear fern. It is very rare in Australia and is on the endangered list, mainly because it's very hard to find and it doesn't spore. It does, however, propagate by division. I believe that tissue culture was tried many years ago, but was mostly unsuccessful.
I have a fernery housing about 30 of these Whitei ferns, as well as a couple of 'ordinary' Drynaria ferns that actually have BOTH FRONDS (but predominately the basic fern.)
I have, on rare occasions, pondered the idea of trying to propagate from these fertile fronds, in the hope that I MIGHT get a Whitei fern, but have never got around to it.
If you would like some leaves to test, let me know and I'll post some down to you.....I'm on the Gold Coast.
Changi
