I was on top of Mount Si looking for Aspidotis densa and Myriopteris gracillima, both of which are found on Little Si. I looked hard and found neither (on main peak Mount Si), and I am posting a few probable Cryptogramma acrostichoides observations (just leafing out so hard to be sure of species) mostly to document that I looked hard on most of the visible/accessible rock faces except the north side of the Haystack. I saw lots of other Cryptogramma similar to this one but I am sparing you most of the photos.