Melee◆ stone longsword +13 (reach 10 feet), Damage 1d8+10 bludgeoning
Melee◆ shield bash +13, Damage 1d6+10 bludgeoning
Shield Push◆◆ The arboreal warden Strides and then makes a shield bash Strike. If the attack hits, the target is pushed 10 feet.
Source: Pathfinder Monster Core
Running this fight? Add the arboreal warden to the initiative tracker: type its name and the AC, hit points and Perception for initiative fill in, and the book button shows this stat block mid-fight.