urgent

I have this green Japanese maple tree that I don't know its species. It has lost almost 90% of its leaves. When I got it, it looked sick and many of its leaves had dried up, and it was in a room with a split air conditioner that was on during the day and off at night, and the room temperature...

Hi everyone. Seeking urgent advice. I accidentally left my hornbeam bonsai out in direct sunlight (in 24c heat) for 3 days, without a drop of water. I came back from a long weekend to a very poorly scorched little bonsai. The leaves have yellowed and gone all crispy dry. See the photo...