Oh, and here's a first attempt at a Hazard version of the strangle vine for those who can't be bothered with a full monster. I added the DR 5/slashing and tweaked the DCs and damage a bit to justify making them CR1.
Strangle Vine (CR 1)
Strangle vines are carnivorous plants that grow in forests and swamps. Most strangle vine patches are 10 to 30 feet across, but they can cover areas ranging from a few square feet to several acres. These plants mimic harmless vines or creepers, it takes a DC20 Survival or Knowledge (nature) check to notice a strangle vine is a dangerous plant. Any creature that contacts a strangle vine must succeed on a DC 15 Reflex save or be seized by its vines. If they succeed, they must check again every round they remain in contact with the vine.
Seized creatures are entangled, cannot move out of the space they where standing in when the vines seized them, and take 1d6+2 damage per round from being "strangled". Any creature in a strangle vine's grasp cannot speak or cast spells with verbal components, because the vines wrap round the victim's head and neck and try forcing themselves down the victim's throat. A seized creature can escape by succeeding on a DC 15 Strength check or a DC 15 Escape Artist check or when the vine's hit points are reduced to 0. A seized creature can only attack the vines with light slashing or piercing weapons.
Each strangle vine occupies a 5-foot square and has 8 hit points, AC13 and damage reduction 5/slashing. A command plants spell will stop strangle vines attacking, affecting two 5-foot squares per caster level. A diminish plants spell will weaken a strangle vine's strangling by reducing the damage to 1d4 and the Reflex, Strength and Escape Artist DCs to 10, while a plant growth spell increases the strangling damage to 1d6+6 and the DCs to 20.
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