Oh wow--it really does kinda look like that!
Now, the big question is --is it even possible to get something like skeleton fork fern from asparagus fern???
How related are they? There was also a generic Asparagus setaceus type in another container about three feet away from the foxtail fern on the porch during the summer of seed-making...
Yes--I am certain that it was the asparagus fern seed --no mislabeling--because I personally took the dried seeds off of my asparagus fern plant and 'sowed' them among the roots of a ficus tree in the pot where these are growing. I didn't put any other seeds in there and I didn't have any other seeds to confuse them with. The potting soil is/was oldish--didn't add any at the time or since. The ficus I have had for about 15 yrs--last repotted the ficus three years ago, along with several other plants, none of which have sprouted this weird fern thing--except for the ficus pot where I put the asparagus fern seeds.
And I have no possible way to account for 'Floridian spores' or greenhouse weeds making their way to my potted ficus...but if these are Psilotum nudum, and they come from spores not seeds, then something strange has happened I suppose and it is just a bizarre coincidence that these are growing where I put asparagus fern seeds