Sick Echinopsis mamillosa Update
I've been misting it, but it hasn't been improving at all, and the flower bud is still growing. So, I think that means the plant's not dormant. From that conclusion, I checked the roots today, and I thought they were healthy the first time I posted. However, the whole system has been dried out from the beginning. I cut all the dead roots back to the base of the plant leaving two root bases. I've got it lying in the soil with the base's current state as seen in the second link. I'll continue the care of it as has been instructed.
Actually, should I make a larger, cleaner cut and let it callous over? Also, do you think I should remove the bud (flowering uses a lot of energy...)?