N Huge Plant

AC 16, touch 7, flat foot 16 ( -1 Dex, +9 Natural, -2 Size)
hp 94 (9d8+54); regeneration 10 (bludgeoning and acid)
Fort +12, Ref +2, Will +4
Defensive Abilities Plant Traits

Speed 20 ft.
Melee Bite +13 (2d8+9 plus grab) and 2 Tendrils +8 (d6+4 plus grab)  
Space 15 ft.; Reach 15 ft.
Special Attacks Grab, Swallow Whole (2d6 acid damage + paralysis (DC 20, 3d6 rounds), AC 14, 25 hp)

Str 28, Dex 9, Con 22, Int 3, Wis 8, Cha 3
Base Atk +6; CMB +17 (+21 for grapple); CMD 26
Feats Improved Natural Attack, Iron Will, Power Attack, Skill Focus (Perception), Skill Focus (Stealth) 
Skills Perception +6, Stealth +5  
Languages None

This creature looks like a mound of vegetation supported by vines and branches.  The mass has a huge maw filled with thorns and sharp branches that act as teeth.