The magical glade effect happens after you end your turn. So you must discard a card in this case.
However, you can always just discard the wound card (as your whole turn), and then throw it away from your discard pile (since the glade can "heal" wounds out of your discard pile).
So technically you:
1. "Rest" and discard a wound
2. End your Turn
3. Throw away a wound from your discard using the magic glade
That's "Slow Recovery", and can only be done if you have no non-wounds cards in hand.