Hi Chiara thanks for the advice but what is a ghost tree.

It looks like parsley and or celery leaves, but it has a very mild scent (not edible).  Legend said this plant makes human invisible to the ghosts and gobblins.  

Two men encountered some ghosts one time and went to hide behind this plant.  It shielded them from the bad spirits and I guessed that was how the plant became known.

Hi there thanks for that interesting bit of information.

God bless

I was 11....it came to my room....it was 7-8ft tall....ruby red eyes.....not an incubus....much worse....
sometimes I think I know its name....it was one of the 72.....It wanted me to ask it to help me....It was a demon...that brought itself to me...not a familiar....i know by the way it looked and the way it spoke. Call it what you will.....it wanted to make a deal.Thats a demon.

demons and ghosts are very real and can be very dangerous.  

if you have problems with ghosts and are sure they are not demons the best thing you can do is offer merit to them (do good deeds, read scriptures, and chant mantras and holy names for them) when you do this offer the merit generated from such activities to them so that their suffering will decrease and they will find a better rebirth.  often when ghosts come to people they are in need of help or are suffering so much and hope the humans can help them.  sometimes they can manifest in ways that are very scary and of course there are some vengeful ghosts who have malicious intent.  even if this is the case, have compassion for them and offering merit.

demons are a very different breed indeed.  these beings can cause all sorts of harm both physically and psychologically.  they can harm us bodily; my father was choked by the one that resides in the house i used to live in.  they can also drive us to the brink of insanity not to mention the spiritual harm and the possibility of possession.  if you are dealing with a demon remember that you are entitled to not be harassed by them and if one invades your home, be strong.  also seek the help of the religious professionals in whatever religion you practice.  

as was already mentioned, sage is a good cleanser.