Thanks for the reply. None of the leaves of that plant show any sign of wilting or spotting or any other negative thing.
But I do have a bunch of dying marsilea stalks that I cut back to near substrate, but did not want remove any more so as not to damage the new growth just eminating through the substrate.
I had purchased the marsilea along with other plants and the marsilea all died. I was going to pull it out and take it back to the supplier when I noticed that there was new growth around each dead stalk.
I'll try to remove more of the dead material rather than wait any longer.