Pit Plant. The pitcher plant is completely immobile and rooted underground, making it nearly impossible to attack it from up close or from anywhere that isn't above it. The plant can only be hit by a melee attack from a source that occupies the same space as it. A creature can only target the plant with a ranged attack while it can clearly see into it from a height higher than the ground it is burrowed in. The plant is immune to spells or effects that do not spread around corners. The plant is immune to being flanked and cannot move or be moved unless the ground it is burrowed in is excavated. The pitcher's pit can fit as many creatures as it can share its space with. A creature in the acid-filled pit is restrained, unable to breathe, and takes 30(8d8) acid damage at the start of the plant's turn. 

Camouflaged Petals. The pitcher plants' petals are thick and naturally resistant to damage. The plant can open or close its petals as a bonus action. If its petals are closed, and the plant remains motionless, at the start of combat, it looks just like undisturbed ground and foliage and has advantage on its initiative roll. Moreover, if a creature hasn't observed the plant move or act, that creature must succeed on a DC 18 Intelligence (Investigation) check to discern that the ground is animate. While the plants' petals are closed it cannot make any attacks, is resistant to all damage and cannot be poisoned. 

Multiattack. The pitcher plant makes three Tentacle attacks.

Tentacle. Melee Weapon Attack: +11 to hit, reach 30 ft., one target. Hit: 17 (3d6 + 7) bludgeoning damage; if the target is a creature, it is grappled (escape DC 17). The pitcher plant has 4 tentacles, each of which has an AC of 12, 30 hit points, an immunity to acid damage, a weakness to slashing damage, and can grapple one target. The plant regrows 1d4-1 tentacles at the start of its turn if it is missing any. 

Reel. The pitcher plant pulls in each creature grappled by it up to 25 feet toward the center of its space.