Green Flower of Functionality and Resist Poison Should Stack

[Erati]

It is certainly buffing Poison now as I found out it was alrdy bugged once, however the poison buff currently is not stacking with resist poison and it appears these buffs should stack.

These are logs from Beta server after completing the Green Flower Quest

[Tue Dec 02 20:35:37 2014] You begin casting Resist Poison.
[Tue Dec 02 20:35:42 2014] You feel resistant from poison.

[Tue Dec 02 20:35:45 2014] You begin casting Aura of Green Petals.
[Tue Dec 02 20:35:45 2014] Your Green Flower of Functionality begins to glow.
[Tue Dec 02 20:35:47 2014] Your resist poison fades.
[Tue Dec 02 20:35:47 2014] You are covered by an aura of green petals.

So Green Petals buff overwrote Resist Poison.

[Tue Dec 02 20:35:55 2014] You begin casting Resist Poison.
[Tue Dec 02 20:35:59 2014] Your spell did not take hold.

According to Wiki

The green flower (4 knight cards) give +50 poison resist and it seems to stack with just about everything including Resist Poison.

and other verbal sources ( Dald said they stacked on mac )