The White Tree

The White Tree hosts the Wyldwood Sacred Shrine.
Quercuis thinks that the White Tree is the whichever tree that 'Father' currently resides in - the last White Tree being the at Onwens Villa. See Quercuis' theories. However, Phinon says that this is not the White Tree (though it will be a descendent of it), but a tree for a new shrine.Day 103 - Open the box or take the money
----
Of course, since only the upper echelons of the Wyldwood priesthood know where the White Tree is to be found, few priests complete this pilgrimage.
The party believes that it is located in Far Haven, but will go along with Wyldwood charade that it couldn't possibly be there, and that this was just a 'joke' that Onwen played on Bez Drock. (And which he maintained throughout the 26 years of their friendship. Obviously.)
According to Bez DrockZoom session 18th March – Meeting Bez Drock: , The shrine [at Far Haven] housed The White Tree – ie that was what was sealed off beneath the stones. He sincerely hoped that once the shrine was fully reconsecrated (the White Tree 'properly planted' was his phrase) then 'we' might stand a chance against the Wild. (Note: there always remained a way into the White Tree for those completing the pilgrimage. And this was the reason that it was not made into a pilgrimage site, as it already was the ultimate pilgrimage site.)
According to Quercuis: 
Uil Treesoar laughed his head off when Q. asked about the White Tree at Far Haven. Suggested that Bez Drock was senile or that Onwen was entertaining himself by confusing the poor idiot. The White Tree was not white nor indeed necessarily a tree but certainly not the White Tree although it may have been a silver (definitely not white) birch which might admittedly be a tree but it wasn't ever and will never be the White Tree and Far Haven was only a secondary shrine anyway and the party thinking they know about it is therefore completely irrelevant because it's all complete and utter bollocks. (Q. analysis - this is bollocks. What has happened only remotely makes sense if there was a source of very great power in the temple at Far Haven and it being the earliest known Wyldwood shrine also supports this probability.)
Golderod: Each of the 7 pilgrimage sites has a similar stone with identical engravings, although the one at The White Tree is noticeably older than the others.Day 35-41 – The fourth week in Northlake
Q’Ran: “Only those who have completed six of the seven shrines will ever know where the White tree is situated, and those who have visited it will never reveal where it isDay 49-57 – Centaurs
The party has speculated on a link to the legend of Ilrania the First, but not found any evidence so far.